名词
中文翻译：石蕊
同义词：
['phenolphthalein', 'methyl red']
例句：
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1.Styracin is a common chemical used in dyeing and printing.
石蕊是一种常见的化学试剂，用于染色和印刷。
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2.The color change of styracin is due to its interaction with acids.
石蕊的颜色变化是由于它与酸的相互作用。
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3.In the laboratory, styracin is commonly used as a pH indicator.
在实验室中，石蕊常被用作pH指示剂。