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....
I think they saw it as a natural progression for me.我想他们认为这对我来说是顺理成章的。Both drugs slow the progression of HIV, but neither cures the disease.这两种药物都可以延缓艾滋病病情发展，但是都不能治愈这种疾病。I believe in progression, in taking risks, in neve...
但是人是一种不再知道即刻的存在.But man is a being who no longer knows the immediate.这个方案不太可能产生即刻的影响.The scheme's immediate impact is likely to be minimal.我还意识到,即刻的满足并不能给我带来什么.I also realized that immediate satisfaction wasn't...
It is incumbent upon all of us to make an extra effort.我们所有人都必须加倍努力。He defeated the incumbent governor by a large plurality.他以压倒多数票击败了现任州长.It is incumbent upon us to do so.这样做是我们义不容辞的责任。Dislodging an incumbent currency c...