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单词 universal indicator
释义

universal indicator

noun
/ˌjuːnɪˌvɜːsl ˈɪndɪkeɪtə(r)/
/ˌjuːnɪˌvɜːrsl ˈɪndɪkeɪtər/
(chemistry)
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  1. a substance that changes colour when another substance touches it, indicating whether it is an acid or an alkali
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更新时间:2024/11/15 10:42:02