词汇 | phenolphthalein |
释义 | phenolphthalein noun [ U ] chemistry specialized uk/ˌfiː.nɒlˈfθæl.iːn/ us/ˌfiː.noʊlˈθæl.iːn/ 酚酞 a substance that is colourless when it is mixed with an acid and pink or red when mixed with an alkali |
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