Butyraldehyde 1,2 proparediol acetal was synthesized by using stannous chloride as catalyst.以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride as catalyst.以非质子...
Whatever troubles arise, we'll have peace of mind amidst seeming chaos.无论出现什么样的麻烦,我们都会在貌似混乱的情形中保持平和的心态。The board acknowledges problems which arise from the newness of the approach.董事会承认使用新方法产生了种种问题。One complication ...
He smirked in acknowledgement of their uncouth greetings, and sat down.他皮笑肉不笑地接受了他的粗鲁的招呼, 坐了下来.Two men looked at me, nudged each other and smirked.两个男人一面看着我,一面用胳膊肘顶顶对方,笑容里夹杂着一丝得意。Two men looked at me, nudged each other a...
目的: 探讨影响双胎妊娠临床结局的相关因素.Objective : To study factors related to twin pregnancy clinical outcome.目的总结94例双胎妊娠的分娩方式及妊娠结局.Objective To investigate the outcome of twin pregnancy for 94 cases.不孕治疗的单卵双胎和双卵双胎的机会都增加.Infertility tre...