这个词是什么意思？
A family of isomeric, colorless aromatic hydrocarbon liquids, that contain the general formula C6H4(CH3)2. They are produced by the destructive distillation of coal or by the catalytic reforming of petroleum naphthenic fractions. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D014992 · MeSH 2026。
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