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(代一个氢)或多(代多个氢)的物质
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(代一个氢)或多(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,教育组费黛奥塔·卡朋和盖洛普组于美国公立学校的意见。
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