名词
中文翻译：氮肥
同义词：
['nitrogen fertilizer', 'nitrogen compound', 'nitrogen source']
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 farmer used a nitrification process to improve soil quality.
农民使用了硝化过程来提高土壤质量。
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3.Nitrogen fertilizers are commonly used in agriculture to increase crop yields.
氮肥在农业中被广泛使用，以增加作物产量。