名词
中文翻译：氮浓度
同义词：
['nitrogen content', "nitrogen level例句：1. The soil's nitrogen concentration is critical for plant growth.（土壤的氮浓度对植物生长至关重要。）"]
例句：
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1. The soil's nitrogen concentration is critical for plant growth.
土壤的氮浓度对植物生长至关重要。
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2. The manufacturer has increased the nitrogen concentration in the fertilizer to enhance its effectiveness.
制造商已提高肥料中的氮浓度以增强其效果。
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3. The high nitrogen concentration in the lake water could be a sign of pollution.
湖泊水中高氮浓度可能是污染的迹象。