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词汇 atomic number 17
释义 atomic number 17
基本英英
英Noun:a common nonmetallic element belonging to the halogens;best known as a heavy yellow irritating toxic gas;used to purify water and as a bleaching agent and disinfectant;occurs naturally only as a saltas in sea water

Noun:
a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt as in sea water
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