Ammonia gas NH 3 is colorless which can turn wet red litmus paper to blue.
氨气是无色的,它可把湿的红色石蕊试纸变成蓝色.
词典释义:
红色石蕊试纸
Ammonia gas NH 3 is colorless which can turn wet red litmus paper to blue.
氨气是无色的,它可把湿的红色石蕊试纸变成蓝色.
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