- The homologs of benzene are those containing a alkyl goup or alkyl groups in place of one or more hydrogen atoms.
苯的同系物是那些苯环上含有单烷基(取代一个氢)或多烷基(取代多个氢)的物质 - Each year, the education goup group Phi Delta Kappa and the Gallup organization gather opinions about American public schools.
每年,教育组织费黛奥塔·卡朋和盖洛普组织收集关于美国公立学校的意见。
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