weed-free

weed-free 基本解释

网络  无水藻的

医学

重点词汇

• freea. 自由的, 享受政治权力的, 允许的, 免费的, 丰富的 vt. 释放, 解放, 使自由 adv. 自由地, 免费
• weedn. 杂草, 野草 vi. 除草 vt. 除...的草, 剔除

weed-free 双语例句

1. 1、 Field experiments were conducted in paddy to study the functional relationships between the weedy or weed-free days and the yield loss rate of rice transplanted by throwing, and determine the threshold period of weed control in rice field.
   通过多年多点试验，建立抛栽水稻大田立苗后有草天数或无草天数与水稻产量损失率之间的函数关系，以探明抛栽水稻田间杂草的生态防治阈期。