音标发音英式音标 [ˌfiː.nɒlˈfθæl.iːn]美式音标 [ˌfiː.noʊlˈθæl.iːn]英式发音 基本解释酚酞。同根派生 英英字典剑桥英英字典 a substance that is colourless when it is mixed with an acid and pink or red when mixed with an alkali