They ran for the culvert and ducked in.他们跑到涵洞跟前,钻了过去.He ducked his head to hide his admiration...他低下头以掩饰他的仰慕之情。He ducked in time to save his head from a blow from the poker...他及时低下头，躲过了拨火棍的击打。He had ducked the confrontat...
Azone is synthesized with caprolactam and 1 - bromododecane by phase transfer catalysis, the yield is > 70 %.以己内酰胺、澳代十二烷为原抖,采用相转移催化法合成氮酮, 收率达到70%以上.A wide | bore capillary was employed to determine caprolactam content.利用...