nitrate
柯林斯词典
1. N-MASS Nitrate is a chemical compound that includes nitrogen and oxygen. Nitrates are used as fertilizers in agriculture. 硝酸鹽
High levels of nitrate occur in the Midwest because of the heavy use of fertilizers. 因爲大量使用化肥,中西部地區的硝酸鹽含量很高。
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