Fertilizer use differs from country to country, and from too little to too much. Nitrogen and phosphorus can produce big crops. But they can also pollute water and air.
英
美
释义
每个国家的肥料使用各不相同,有的太少,有的太多。氮素和磷素能够促进作物生长,但是也会污染水和空气。
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