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....
16这样,贫寒人有指望, 不义者塞口无言.Thus the poor have hope, And Injustice stops her mouth.这样,贫寒的人有指望, 罪孽之辈必塞口无言.So the poor hath hope, and iniquity stoppeth her mouth.16这样,贫寒的人有指望, 罪孽之辈必塞口无言.So the poor have hope, and injustice shuts ...
The rate of substrate change is dependent of substrate concentration.被酶作用物变化速率取决于被酶作用物的浓度.The effect of substrate temperature on the accumulation of disorder is substantial.衬底温度对于无序区积累的影响是很显著的.Succinate was the most effe...
Dave, the pianist, played it over a couple of times.演奏钢琴的戴夫将这支曲子反复弹了两三遍。I'm broke, Livy, and I owe a couple of million dollars.我破产了，莉薇，而且我欠了几百万美元的债。He thumbed through a couple of pages, feigning just a slight intere...
For most of our history we were isolationist. For two fleeting decades we were predominant.在过去相当长的时期内,我们一直奉行孤立主义, 当然也曾有过短暂的20年居于世界的支配地位.Art is long,and time is fleeting.时光飞逝,学艺无穷。She wondered for a fleeting moment if he ...
她不断倾泄对于母亲憎恨她的联想.C . continued an outpouring of associations to her mother's hatred of her.虾群缓缓爬上大石头, 虾虎鱼则是游过倾泄而下的水层.The shrimp simply crawl up the boulders, while the fish swim through films of cascading water.时雨滂沱自...