smelling salts
noun [ plural ] uk/ˈsmel.ɪŋ ˌsɒlts/ us/ˈsmel.ɪŋ ˌsɑːlts/
嗅盐（一种苏醒剂）
a chemical with a strong smell that is put under the nose of people who have become unconscious in order to make them awake again
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