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单词 litmus
释义

litmus

noun
/ˈlɪtməs/
/ˈlɪtməs/
[uncountable]
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  1. a substance that turns red when it touches an acid and blue when it touches an alkali
    • litmus paper
    Oxford Collocations DictionaryLitmus is used before these nouns:
    • paper
    See full entry
    Word OriginMiddle English: from Old Norse lit-mosi, from litr ‘dye’ + mosi ‘moss’.
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更新时间:2024/11/11 17:53:24