A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color.
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15. 我必须喂鸡，还得给土豆除草松土。
I have to feed the chickens and hoe the potatoes.
《柯林斯英汉双解大词典》
16. 迄今为止，我全部的园艺经验就是给花圃徒劳地除草。
To date, the sum of my gardening experience had been futile efforts to rid the flower beds of grass.
《柯林斯英汉双解大词典》
17. 除草剂可能会破坏湖泊中某些稀有植物的种群。
The herbicide might damage populations of certain rare plant species that the lake contains.
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18. 因为雨后他们有许多除草的事要做，所以他们去干活了。
As they had a good deal of weeding to do after the rains they fell to work.
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19. 所有的食物都可以有机种植，不需要除草剂、杀虫剂和化肥。
All the food could be grown organically, eliminating the need for herbicides, pesticides and fertilisers.
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20. 除草剂的使用和集约型农业使得现在小麦和大麦麦田里几乎没有杂草。
The use of herbicides and intensive forms of agriculture means that fields of wheat and barley now have few weeds.
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21. 另一方面，人造除草剂虽然不再持久，但可以在作物生长时重新使用。
Synthetic herbicides, on the other hand, although not any longer lasting, can be reapplied as the crop grows.
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22. 该机器的发明者声称，它将减少人工除草的需要，从而降低劳动力成本。
The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.
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23. 对农民来说至关重要的是，他们用来控制杂草的除草剂不能损害他们的庄稼。
It is crucially important to farmers that the herbicides they use to control weeds not damage their crops.
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24. 他们发现，居住的时间越长，采用的改良植物品种越多，而使用的化学除草剂越少。
They found that longer residence correlated with more adoption of improved plant varieties but less adoption of chemical herbicides.
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25. 大豆和玉米不是在同一块地里播种的；然而，大多数农民不愿意在他们的玉米上使用除草剂。
Soybeans and corn are not sown together in the same filed; nevertheless, most farmers are reluctant to use the herbicide on their corn.
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26. 我十四岁的一个夏日早晨，父亲把我早早叫醒，说：“起床了。你要和我一起去花园除草了。”
My father woke me up early one summer morning when I was fourteen and announced: "Get up. You're going with me to cut the grass in the garden."
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27. 为了消除这种杂草，生物学家建议用某种对人类和水生动物无毒的除草剂来处理受感染的部分湖泊。
In order to eliminate the weed, biologists proposed treating infested parts of the lake with a certain herbicide that is nontoxic for humans and aquatic animals.
One very effective herbicide is safe for corn, but soybeans are damaged even by the herbicide's residue, which remains in the soil more than a year after the herbicide is applied.
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29. 氨三唑是一种除草剂，在实验动物身上发现会导致癌症。
Aminotriazole is a weedkiller found to cause cancer in laboratory animals.
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30. 经五步反应合成得到磺酰脲类除草剂玉嘧磺隆。
Sulfonylurea herbicide Rimsulfuron was synthesized by a five-step reaction.
