名词
中文翻译：氮
同义词：
['ammonia', 'nitrate', 'nitrite']
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 in this area is rich in nitrogen.
这个地区的土壤富含氮。
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3. Nitrogen fertilizers are used to enrich the soil with nutrients.
氮肥用于给土壤增加养分。