名词
中文翻译：氮肥
同义词：
['nitrogen fertilizer', 'nitrogen compound']
例句：
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1.Nitrogen is an essential element for plant growth.
氮是植物生长所必需的元素。
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2. The soil needs to be enriched with nitrogen to promote plant growth.
土壤需要施用氮肥以促进植物生长。
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3. The farmer applied a nitrogen fertilizer to the field before planting.
农民在播种前给田地施用了氮肥。