catch

catch是什么意思、catch怎么读

读音:[kætʃ][kætʃ]

catch 基本解释

v.  接住; 截住; 拦住; 接(落下的液体); 抓住; 握住
n.  接(球等); 总捕获量; 扣拴物; 扣件

catch 词性变化

过去分词:caught过去式:caught现在分词:catching第三人称单数:catches复数:catches

中考高考CET4考研IELTSTEM4

catch 词组短语

catch 详细解释

verb

    接住 hold

  1. 接住;截住;拦住
    to stop and hold a moving object, especially in your hands
    1. She managed to catch the keys as they fell.
      她接住了落下的钥匙。
    2. ‘Throw me over that towel, will you?’ ‘OK. Catch!’
      “请你把毛巾扔过来好吗?”“好,接住!”
    3. The dog caught the stick in its mouth.
      狗衔住了木棍。
  2. 接(落下的液体)
    to hold a liquid when it falls
    1. The roof was leaking and I had to use a bucket to catch the drips.
      屋顶漏雨,我不得不用桶来接。
  3. 抓住;握住
    to take hold of sb/sth
    1. He caught hold of her arm as she tried to push past him.
      她试图从他身边挤过去时,他一把抓住了她的手臂。
  4. 捉住 capture

  5. 逮住;捕捉;捕获
    to capture a person or an animal that tries or would try to escape
    1. The murderer was never caught.
      这个杀人犯一直未抓到。
    2. Our cat is hopeless at catching mice.
      我们的猫绝对捉不到老鼠。
    3. How many fish did you catch?
      你捕到几条鱼?
  6. 某人正做某事 sb doing sth

  7. 当场发现(或发觉)
    to find or discover sb doing sth, especially sth wrong
    1. I caught her smoking in the bathroom.
      我撞见她在盥洗室里抽烟。
    2. You wouldn't catch me working (= I would never work) on a Sunday!
      你绝对不会看到我在星期日工作!
    3. She caught herself wondering whether she had made a mistake.
      她发觉自己在怀疑是否犯了错误。
    4. He was caught with bomb-making equipment in his home.
      他被发现家里藏有制造炸弹的设备。
    5. Mark walked in and caught them at it (= in the act of doing sth wrong) .
      马克走了进去,发现他们正在干坏事。
    6. thieves caught in the act
      偷窃时被当场抓住的窃贼
    7. You've caught me at a bad time (= at a time when I am busy) .
      你现在来找我可不是时候。
  8. 及时 be in time

  9. 及时做(或谈等)
    to be in time to do sth, talk to sb, etc.
    1. I caught him just as he was leaving the building.
      他正要离开大楼时,我追上了他。
    2. I was hoping to catch you at home (= to telephone you at home when you were there) .
      我本希望赶上你在家的时候给你打电话。
    3. The illness can be treated provided it's caught (= discovered) early enough.
      此病若及早发现是可医治的。
    4. to catch the post (= post letters before the box is emptied)
      (寄信)赶上邮局的收信时刻
    5. Bye for now! I'll catch you later (= speak to you again later) .
      再见!下次再谈。
  10. 公共汽车;火车;飞机 bus/train/plane

  11. 赶上(公共汽车、火车、飞机等)
    to be in time for a bus, train, plane, etc. and get on it
    1. We caught the 12.15 from Oxford.
      我们赶上了12:15从牛津发出的火车。
    2. I must go─I have a train to catch.
      我得走了——我要赶火车。
  12. 意外地发生 happen unexpectedly

  13. 突然遭受
    to happen unexpectedly and put sb in a difficult situation
    1. His arrival caught me by surprise .
      他的到来让我感到意外。
    2. She got caught in a thunderstorm.
      她遇上了雷雨。
  14. 看见;听到 see/hear

  15. 看见;听到;出席;参加
    to see or hear sth; to attend sth
    1. Let's eat now and maybe we could catch a movie later.
      咱们现在就吃吧,也许还能赶上一场电影。
  16. 疾病 illness

  17. 得病;染疾
    to get an illness
    1. to catch measles
      染上麻疹
    2. I think I must have caught this cold from you.
      我的感冒想必是你传染的。
  18. 被缠住 become stuck

  19. (被)钩住,夹住,绊住
    to become stuck in or on sth; to make sth become stuck
    1. Her dress caught on a nail.
      她的连衣裙被钉子钩住了。
    2. He caught his thumb in the door.
      他的拇指被门夹住了。
  20. 打 hit

  21. 击中;打
    to hit sb/sth
    1. The stone caught him on the side of the head.
      他头的侧面被石头击中。
    2. She caught him a blow on the chin.
      她一拳打在他下巴上。
  22. 注意到 notice

  23. 察觉;瞥见
    to notice sth only for a moment
    1. She caught sight of a car in the distance.
      她瞥见远处有一辆车。
    2. He caught a glimpse of himself in the mirror.
      他看了一眼镜子中的自己。
    3. I caught a look of surprise on her face.
      我发现她面露惊奇。
    4. He caught a whiff of her perfume.
      他闻到一股她身上的香水味。
  24. 听见;理解 hear/understand

  25. 听清楚;领会
    to hear or understand sth
    1. Sorry, I didn't quite catch what you said.
      对不起,我没听清楚你的话。
  26. 兴趣 interest

  27. 引起,激发(兴趣、想象、注意等)
    if sth catches your interest, etc., you notice it and feel interested in it
  28. 逼真地显示 show accurately

  29. 逼真再现;准确描绘
    to show or describe sth accurately
    1. The artist has caught her smile perfectly.
      艺术家惟妙惟肖地画出了她的微笑。
  30. 光 light

  31. (光)照射;受到(光的)照射
    if sth catches the light or the light catches it, the light shines on it and makes it shine too
    1. The knife gleamed as it caught the light .
      刀在光照下闪闪发亮。
  32. 太阳 the sun

  33. 晒黑;晒红;晒成棕色
    if you catch the sun , you become red or brown because of spending time in the sun
  34. 燃烧 burn

  35. 烧着;着(火)
    to begin to burn
    1. The wooden rafters caught fire .
      木椽子着火了。
    2. These logs are wet: they won't catch.
      这些木柴是湿的,烧不着。
  36. 板球 in cricket

  37. (在球落地前)接住球
    to make a player unable to continue batting by catching the ball they have hit before it touches the ground

noun

    球 of ball

  1. 接(球等)
    an act of catching sth, for example a ball
    1. to make a catch
      接球
  2. 捕获量 amount caught

  3. 总捕获量
    the total amount of things that are caught
    1. a huge catch of fish
      捕获大量的鱼
  4. 固着装置 fastening

  5. 扣拴物;扣件
    a device used for fastening sth
    1. a catch on the door
      门闩
    2. safety catches for the windows
      安全窗钩
  6. 困难 difficulty

  7. 隐藏的困难;暗藏的不利因素
    a hidden difficulty or disadvantage
    1. All that money for two hours' work─what's the catch?
      干了两小时的活就给那么多钱——这里面有什么鬼?
  8. 儿童游戏 child's game

  9. (儿童)传接球游戏
    a child's game in which two people throw a ball to each other
  10. 人 person

  11. 理想的对象;意中人;雇用的好对象;看中的人
    a person that other people see as a good person to marry, employ, etc.

catch 同义词辨析

  arrestcapturecatchseize【导航词义:抓住】

  arrest v. 逮捕,拘留

〔辨析〕指对罪犯或犯罪嫌疑人进行拘捕并予以监禁或拘留。

〔例证〕
He was arrested by the police.
他被警察逮捕了。
His friend was arrested for fraud.
他朋友因诈骗被捕。

  capture v. 捕获,俘虏

〔辨析〕指通过使用武力或计谋等捉住人或动物并将其关押。

〔例证〕
He was captured in a battle.
他在一次战斗中被俘。
That tiger was finally captured.
那只老虎终于被捕获了。

  catch v. 抓住

〔辨析〕普通用词,多指通过追踪、武力、突袭等捉住跑动或隐藏中的人或动物。

〔例证〕
The police caught the thief.
警察抓住了那个窃贼。
The cat catches mice.
猫捉老鼠。

  seize v. 抓住

〔辨析〕指突然而有力地抓取。

〔例证〕
Suddenly the little girl seized his arm.
那个小女孩突然抓住他的胳膊。
Who seized the reins of the spooked horse?
谁抓住了受惊的马的缰绳?

  takeboardcatchembarkget on【导航词义:乘坐】

  take v. 搭乘,乘坐

〔辨析〕普通用词,指乘坐某种交通工具或走某条道路。

〔例证〕
In New York, did you ever take the subway alone late at night?
在纽约,你有没有在深夜单独乘过地铁?
I would rather take the plane.
我更愿意乘飞机去。
Take the right fork at the crossroads.
到十字路口走右边的岔道。

  board v. 〈正式〉登上

〔辨析〕指登上车、船、飞机等。

〔例证〕
Drake and I decided to board a train for Geneva.
我和德雷克决定乘火车去日内瓦。
We're boarding at gate 8.
我们在8号登机口登机。
We joined the passengers waiting to board.
我们加入到等候上船的旅客队伍中。

  catch v. 赶上

〔辨析〕指及时登上飞机、火车、公共汽车等。

〔例证〕
He got up very early so as to catch the first train.
他起得很早,以便赶上头班火车。
He suddenly discovered that it was too late to catch the last bus.
他突然发现时间很晚,赶不上末班公共汽车了。
She was about to leave the office to catch a flight to London.
她正要离开办公室去赶飞往伦敦的一班飞机。

  embark v. 乘船,装载

〔辨析〕主要指乘船,也可指船载运旅客、货物。

〔例证〕
Early in the morning they embarked the ship for Miami.
他们一早就登上了开往迈阿密的轮船。
He embarked at London.
他在伦敦上的船。
This ship embarked passengers and cargoes.
这艘船载有旅客和货物。

  get on phr. v. 登上,上(车)

〔辨析〕指上车、船、飞机等,多用于非正式文体。

〔例证〕
A ticket inspector got on the train.
查票员上了火车。
When the bus came to a stop, some passengers got on.
当公共汽车到站时,一些乘客上了车。
We got on the plane at Paris.
我们在巴黎上的飞机。

catch 短语动词

catch on

1. 明白;懂得;认识到  2. 时兴;流行  

catch out

1. 使原形毕露;抓住…的短处  

catch up

1. 赶上;追上;跟上  2. 赶上,达到(标准、水平等)  3. 补做;赶做  4. 了解近况;叙旧  5. 牵扯进;卷入  

catch up with

1. 捕获,擒获,捉拿到(犯错者)  2. 和…算旧账;使…最终尝到苦果  

catch 短语用例

    catch at sth

      catch at sth

        catch on

        1. 受欢迎;流行起来;变得时髦
          to become popular or fashionable
          1. The roof was leaking and I had to use a bucket to catch the drips.
            屋顶漏雨,我不得不用桶来接。

        catch on (to sth)

        1. 理解
          to understand sth

          catch sb out

          1. 使突陷困境
            to surprise sb and put them in a difficult position
            1. 抓住某人的短处;指出无知;指出过失
              to show that sb does not know much or is doing sth wrong
              1. I caught her smoking in the bathroom.
                我撞见她在盥洗室里抽烟。
              2. You wouldn't catch me working (= I would never work) on a Sunday!
                你绝对不会看到我在星期日工作!
              3. She caught herself wondering whether she had made a mistake.
                她发觉自己在怀疑是否犯了错误。
              4. He was caught with bomb-making equipment in his home.
                他被发现家里藏有制造炸弹的设备。
              5. Mark walked in and caught them at it (= in the act of doing sth wrong) .
                马克走了进去,发现他们正在干坏事。
              6. thieves caught in the act
                偷窃时被当场抓住的窃贼
              7. You've caught me at a bad time (= at a time when I am busy) .
                你现在来找我可不是时候。

            catch up on sth

            1. 补做(未做的事);赶做;补上
              to spend extra time doing sth because you have not done it earlier
              1. I caught him just as he was leaving the building.
                他正要离开大楼时,我追上了他。
              2. I was hoping to catch you at home (= to telephone you at home when you were there) .
                我本希望赶上你在家的时候给你打电话。
              3. The illness can be treated provided it's caught (= discovered) early enough.
                此病若及早发现是可医治的。
              4. to catch the post (= post letters before the box is emptied)
                (寄信)赶上邮局的收信时刻
              5. Bye for now! I'll catch you later (= speak to you again later) .
                再见!下次再谈。
            2. 了解(已发生的事情)
              to find out about things that have happened

              be/get caught up in sth

              1. 被卷入;陷入
                to become involved in sth, especially when you do not want to be

                catch up (with sb)

                1. 赶上,追上(某人)
                  to reach sb who is ahead by going faster
                  1. 赶上,达到(某水平)
                    to reach the same level or standard as sb who was better or more advanced
                    1. Let's eat now and maybe we could catch a movie later.
                      咱们现在就吃吧,也许还能赶上一场电影。

                  catch up with sb

                  1. 产生(曾设法避免的)问题
                    to finally start to cause problems for sb after they have managed to avoid this for some time
                    1. to catch measles
                      染上麻疹
                    2. I think I must have caught this cold from you.
                      我的感冒想必是你传染的。
                  2. 终于查到某人头上
                    if the police or authorities catch up with sb, they find and punish them after some time

                    catch 习惯用语

                    v.

                      catch your breath

                    • (由于恐惧、震惊等)屏息,屏气
                      to stop breathing for a moment because of fear, shock, etc.
                      1. (跑或激烈运动后)喘口气
                        to breathe normally again after running or doing some tiring exercise
                        1. catch your death (of cold)

                        2. 患重感冒
                          to catch a very bad cold
                          1. catch sb's eye

                          2. 引起某人注意;惹人注目
                            to attract sb's attention
                            1. Can you catch the waiter's eye?
                              你能引起服务员的注意吗?
                          3. catch it

                          4. 受罚;受斥责
                            to be punished or spoken to angrily about sth
                            1. If your dad finds out you'll really catch it!
                              要是你老爸知道了,你非挨骂不可!
                          5. catch sb napping

                          6. 使人措手不及;乘其不备
                            to get an advantage over sb by doing sth when they are not expecting it and not ready for it
                            1. catch sb on the hop

                            2. 使某人措手不及
                              to surprise sb by doing sth when they are not expecting it and not ready for it
                              1. catch sb red-handed

                              2. 当场抓住;现场捕获
                                to catch sb in the act of doing sth wrong or committing a crime
                                1. catch sb with their pants down

                                2. 使突陷窘境;乘人措手不及;出其不意;冷不防
                                  to arrive or do sth when sb is not expecting it and not ready, especially when they are in an embarrassing situation
                                  1. (catch/throw sb) off balance

                                    (catch/throw sb) off balance

                                    be (caught) in a cleft stick

                                  2. 进退维谷;陷入困境
                                    to be in a difficult situation when any action you take will have bad results
                                    1. catch/take sb's fancy

                                    2. 吸引某人;中某人的意
                                      to attract or please sb
                                      1. She looked through the hotel advertisements until one of them caught her fancy.
                                        她仔细查看旅馆广告,终于有一家中了她的意。
                                    3. catch/touch sb on the raw

                                    4. 触到某人的痛处;揭某人的疮疤
                                      to upset sb by reminding them of sth they are particularly sensitive about
                                      1. (caught/stuck) between a rock and a hard place

                                      2. 进退两难;左右为难
                                        in a situation where you have to choose between two things, both of which are unpleasant
                                        1. be caught short

                                          be caught short

                                        n.

                                          (a) catch-22

                                          a catch-22 situation

                                        • 进退维谷的局面
                                          a difficult situation from which there is no escape because you need to do one thing before doing a second, and you cannot do the second thing before doing the first
                                          1. I can't get a job because I haven't got anywhere to live but I can't afford a place to live until I get a job─it's a catch-22 situation.
                                            我没有住所就找不到工作,但是没有工作就没钱租房子——这真是左右为难。

                                        catch 双语例句

                                        1. 1、 Police say they are confident of catching the gunman
                                          警方说他们有信心抓住那个持枪歹徒。
                                        2. 2、 Where did you catch the fish?
                                          这条鱼你在哪儿逮的?
                                        3. 3、 I wondered if it was an animal caught in a trap.
                                          我在想,会不会是什么动物掉进了陷阱。
                                        4. 4、 I jumped up to catch a ball and fell over.
                                          我跳起来接球,结果摔了个跟头。
                                        5. 5、 Liz caught his arm
                                          莉兹一把抓住了他的胳膊。
                                        6. 6、 He knelt beside her and caught her hand in both of his
                                          他跪在她的旁边,双手握住她的一只手。
                                        7. 7、 The stinging slap almost caught his face
                                          那狠狠的一巴掌差点搧在他脸上。
                                        8. 8、 Her ankle caught on a root, and she almost lost her balance
                                          她的脚踝被树根绊了一下,差点摔倒。
                                        9. 9、 We were in plenty of time for Anthony to catch the ferry
                                          我们时间充裕得很,足够安东尼赶上渡船。
                                        10. 10、 He caught a youth breaking into a car
                                          他撞见一个青年正在撬车。
                                        11. 11、 I caught myself feeling almost sorry for poor Mr Laurence.
                                          我突然发觉自己几乎同情起可怜的劳伦斯先生来了。
                                        12. 12、 As she turned back she caught the puzzled look on her mother's face
                                          她转过身来,看见母亲脸上迷惑的表情。
                                        13. 13、 His ears caught a faint cry
                                          他听到一声微弱的叫声。
                                        14. 14、 Bill turns on the radio to catch the local news
                                          比尔打开收音机,收听本地新闻。
                                        15. 15、 I dialled Elizabeth's number thinking I might catch her before she left for work
                                          我拨了伊丽莎白的号码,心里想或许能赶在她去上班前联系到她。
                                        16. 16、 She looked as if the photographer had caught her by surprise
                                          看上去,她好像被摄影师搞了个猝不及防。
                                        17. 17、 My shoes caught his attention
                                          我的鞋子引起了他的注意。
                                        18. 18、 There's no doubt Mr Putin's speech caught the mood of most deputies.
                                          无疑,普金先生的讲话充分反映了大多数代表的心情。
                                        19. 19、 When he was fishing off the island he was caught in a storm and almost drowned
                                          他出岛捕鱼时,赶上一场暴风雨,差点淹死。
                                        20. 20、 The Jordanian leader is caught between both sides in the dispute
                                          争论双方使约旦领导人左右为难。
                                        21. 21、 The more stress you are under, the more likely you are to catch a cold.
                                          压力越大,越有可能患感冒。
                                        22. 22、 The fish is laid out on a large serving plate to catch the juices.
                                          鱼盛在一个大盘子里,以防汤汁洒出来。
                                        23. 23、 They saw the ship's guns, catching the light of the moon
                                          他们看到船上的大炮在月光下熠熠生辉。
                                        24. 24、 A gust of wind caught the parachute.
                                          一阵风将降落伞吹远。
                                        25. 25、 She fiddled with the catch of her bag
                                          她摆弄着包上的搭扣。
                                        26. 26、 The catch is that you work for your supper, and the food and accommodation can be very basic
                                          圈套在于你是在挣钱糊口,但食宿其实有可能非常简单。
                                        27. 27、 The catch included one fish over 18 pounds.
                                          捕获的鱼里有一条重逾18磅。
                                        28. 28、 I was so in love with him and all my friends said what a good catch he was.
                                          我当时和他陷入热恋,我的朋友们都说能找到他是我的福气。
                                        29. 29、 You won't catch me giving him a bad review!
                                          我绝不会说他坏话的。
                                        30. 30、 It makes soldiers happy to know that somebody right at the top has been caught with his trousers down
                                          顶头上司出了大洋相,当兵的最高兴了。

                                        catch 英英释义

                                        noun

                                        1. the act of apprehending (especially apprehending a criminal)
                                          1. the policeman on the beat got credit for the collar

                                          Synonym:    apprehensionarrestcollarpinchtaking into custody

                                        2. the act of catching an object with the hands
                                          1. Mays made the catch with his back to the plate
                                          2. he made a grab for the ball before it landed
                                          3. Martin's snatch at the bridle failed and the horse raced away
                                          4. the infielder's snap and throw was a single motion

                                          Synonym:    grabsnatchsnap

                                        3. a cooperative game in which a ball is passed back and forth
                                          1. he played catch with his son in the backyard

                                        4. a fastener that fastens or locks a door or window

                                          1. a restraint that checks the motion of something
                                            1. he used a book as a stop to hold the door open

                                            Synonym:    stop

                                          2. a drawback or difficulty that is not readily evident
                                            1. it sounds good but what's the catch?

                                            Synonym:    gimmick

                                          3. a break or check in the voice (usually a sign of strong emotion)

                                            1. anything that is caught (especially if it is worth catching)
                                              1. he shared his catch with the others

                                            2. a person regarded as a good matrimonial prospect

                                                Synonym:    match

                                              1. the quantity that was caught
                                                1. the catch was only 10 fish

                                                Synonym:    haul

                                              verb

                                              1. contract
                                                1. did you catch a cold?

                                              2. delay or hold up
                                                1. I was caught in traffic and missed the meeting

                                              3. be struck or affected by
                                                1. catch fire
                                                2. catch the mood

                                              4. grasp with the mind or develop an understanding of
                                                1. did you catch that allusion?
                                                2. We caught something of his theory in the lecture
                                                3. don't catch your meaning
                                                4. did you get it?
                                                5. She didn't get the joke
                                                6. I just don't get him

                                                Synonym:    get

                                              5. detect a blunder or misstep
                                                1. The reporter tripped up the senator

                                                Synonym:    trip up

                                              6. discover or come upon accidentally, suddenly, or unexpectedly
                                                1. She caught her son eating candy
                                                2. She was caught shoplifting

                                              7. become aware of
                                                1. he caught her staring out the window

                                              8. be the catcher
                                                1. Who is catching?

                                              9. catch up with and possibly overtake
                                                1. The Rolls Royce caught us near the exit ramp

                                                Synonym:    overtakecatch up with

                                              10. succeed in catching or seizing, especially after a chase
                                                1. We finally got the suspect
                                                2. Did you catch the thief?

                                                Synonym:    getcapture

                                              11. to hook or entangle
                                                1. One foot caught in the stirrup

                                                Synonym:    hitch

                                              12. cause to become accidentally or suddenly caught, ensnared, or entangled
                                                1. I caught the hem of my dress in the brambles

                                              13. spread or be communicated
                                                1. The fashion did not catch

                                              14. reach with a blow or hit in a particular spot
                                                1. the rock caught her in the back of the head
                                                2. The blow got him in the back
                                                3. The punch caught him in the stomach

                                                Synonym:    get

                                              15. take hold of so as to seize or restrain or stop the motion of
                                                1. Catch the ball!
                                                2. Grab the elevator door!

                                                Synonym:    grabtake hold of

                                              16. capture as if by hunting, snaring, or trapping
                                                1. I caught a rabbit in the trap today

                                                Synonym:    capture

                                              17. take in and retain
                                                1. We have a big barrel to catch the rainwater

                                              18. attract and fix
                                                1. His look caught her
                                                2. She caught his eye
                                                3. Catch the attention of the waiter

                                                Synonym:    arrestget

                                              19. apprehend and reproduce accurately
                                                1. She really caught the spirit of the place in her drawings
                                                2. She got the mood just right in her photographs

                                                Synonym:    get

                                              20. attract
                                                1. She captured all the men's hearts

                                                Synonym:    captureenamourtrancebecharmenamorcaptivatebeguilecharmfascinatebewitchentranceenchant

                                              21. reach in time
                                                1. I have to catch a train at 7 o'clock

                                              22. suffer from the receipt of
                                                1. She will catch hell for this behavior!

                                                Synonym:    get

                                              23. perceive with the senses quickly, suddenly, or momentarily
                                                1. I caught the aroma of coffee
                                                2. He caught the allusion in her glance
                                                3. ears open to catch every sound
                                                4. The dog picked up the scent
                                                5. Catch a glimpse

                                                Synonym:    pick up

                                              24. see or watch
                                                1. view a show on television
                                                2. This program will be seen all over the world
                                                3. view an exhibition
                                                4. Catch a show on Broadway
                                                5. see a movie

                                                Synonym:    watchviewseetake in

                                              25. hear, usually without the knowledge of the speakers
                                                1. We overheard the conversation at the next table

                                                Synonym:    take inoverhear

                                              26. perceive by hearing
                                                1. I didn't catch your name
                                                2. She didn't get his name when they met the first time

                                                Synonym:    get

                                              27. get or regain something necessary, usually quickly or briefly
                                                1. Catch some sleep
                                                2. catch one's breath

                                              28. check oneself during an action
                                                1. She managed to catch herself before telling her boss what was on her mind

                                              29. start burning
                                                1. The fire caught

                                              最新更新词汇: unsafe netconcentration methodorbital platesstring processing applicationcoronal trusionaccounting uses of the computeraccounts receivable accounthypothetical question
                                              更新时间:2026-03-25 02:21