烯空气跟空气十分近似.Olefin gas closely approximates air.所有的主要难点都涌现在烯酮 ( 1 ) 的合成中.All the chief difficulties crop up in the synthesis of the enone ( 1 ).某碳氢化合物已知可能是烯烃或是烷烃.A hydrocarbon was known to be either an alkene or alkane....
"I see anti-depressants as a lifestyle drug," says Dr Charlton.“我认为抗抑郁药是一种改善生活品质的药物，”查尔顿医生说。My boyhood hero was Bobby Charlton.我童年时代的偶像是博比·查尔顿。What do you remember about your first - team debut, against Charlton in Octob...
他们同意通过谈判来努力解决纠纷。They agreed to try to settle their dispute by negotiation.英国雇佣法包括解决劳资纠纷的仲裁和调解机制。UK employment law embodies arbitration and conciliation mechanisms for settling industrial disputes.他卷入了与卫生大臣的法律纠纷之中。He was ...