Phenyl ( or polyphenyl ) substituted epoxides serve as excellent precursors to phenyl ( or diphenyl ) carbenes.

某些苯代 ( 或多苯 ) 环氧乙烷是制取带苯环 ( 或二苯 ) 碳烯的极好原料.

辞典例句

The epoxides were obtained with up to 90 % yields in the reaction system with air.

在空气存在下其氧化产物的产率这90%上.

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The epoxides were obtained with up to 90 % yields in the reaction system with air.

在空气存在下其氧化产物的产率这90%以上.

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