When is a plant considered a weed?
什么时候植物会被当成杂草？
什么是杂草？
A weed is any a plant growing where you don't want it.
杂草，就是生长在你不希望看见它们的地方的植物。
有杂草吗？
She knelt down to pull a weed from the flower bed.
她跪下来拔除花圃上的杂草。
Does it take longer to grow a weed or an oak tree?
种植杂草和橡树哪一个更快？
This species is a troublesome weed.
本种是一根令人讨厌的杂草。
Bill Curran is a professor of weed science at Penn State.
BillCurran是宾夕法尼亚州立大学的杂草科学教授。
It is a bit of a toil to weed this big garden.
清除这个大花园的杂草，这差事有点儿费劲。
Accurate weed identification is the first step in a successful weed control program.
对杂草的精确确认是杂草控制项目成功的第一步。
Accurate weed identification is the first step in a successful weed control program.
对杂草的精确确认是杂草控制项目成功的第一步。
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