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.Note the presence of megakaryocytes, erythroid islands, and granulocy...
His surgical instruments were a knife and a pair of pincers.他的外科手术器械是一把刀和一把钳子。She was no mean performer on a variety of other instruments.许多别的乐器她也演奏得相当出色。You can buy perfectly good instruments for a lot less.你可以少花一大笔钱买到顶...