a safety threshold of 50 mg of nitrates per litre每升含50毫克硝酸鹽的安全下限Our water supply is becoming polluted with nitrates.我們的水源正受到硝酸鹽的污染。Silver nitrate is a salt.硝酸銀是一種鹽類化合物。
英英詞典釋義
Noun
1. any compound containing the nitrate group (such as a salt or ester of nitric acid)
Verb
1. treat with nitric acid, so as to change an organic compound into a nitrate;