Asymmetric 1, 3 - dipolar cycloaddition can be strongly catalyzed by chiral oxazaborolidines.手性唑硼烷酮能够催化不对称1, 3偶极加成反应并取得很好的效果.The cycloaddition itself is the slow step.环化作用本身是慢的一步....
Journalist Walter Lippmann and Joseph Alsop, and so on.新闻记者沃特·李普曼和约瑟夫·艾尔索普等.When all men think alike, no one thinks very much. - --- Walter Lippmann.当所有的人都一样想时, 没人再想那么多. ---- 沃尔特. 李普曼....
How can faculty improve their teaching so as to encourage creativity?教师们如何才能改进教学以激发创造性呢？He inclined forward so as to hear more clearly.他向前倾斜着身体,以便听得更清楚些.The portrait was touched up so as to make it lighter.这张画经过润色,色调明朗了一...
It's theoretically possible, but highly unlikely ever to happen.这从理论上说是有可能的, 但是基本上不会发生.The debits and credits should theoretically balance out within a month.从理论上讲一个月内借方的总额与贷方的总额应当相等。 Such configurations, obtained t...
Have 3 kinds of kind about among them : One, enclothe.其中大约有3种方式: 一 、 覆盖.Enclothe a face miserably no matter China, comparative inside limits of alive still bound big.贫困覆盖面不论中国, 还是在世界范围内都相当大.Raise smallpox to enclothe a m...