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....
She enjoys a sterling reputation in law enforcement circles and among the community in general.总的说来，她在执法界和老百姓当中口碑甚佳。Agency France Presse enjoys great popularity both at home and abroad.法新社在国内外都很有名气.He enjoys making caust...
我有了头痛的先兆。I had the beginnings of a headache.乌云是下雨的明显先兆.Black clouds are an unmistakable sign of coming rain.那被认为是一种不幸的先兆.It is said to be an omen of misfortune....
这些灌木的蔓生枝条该剪了.These straggly stems should be pruned off the bush.他们穿透长着灌木的坚实的硬土一直向下掘.They cut straight downwards through the hard, brush covered crust.热带大草原的啮草黑犀牛有能卷握东西的嘴唇,可以用于吸食灌木的嫩枝叶.The savanna browsing black rhino has...
You have to pay your outstanding bill before joining the scheme.在参加该项目之前必须结清余账。The scheme offers seed corn finance with loans at only 4% interest.该方案提供种子基金融资，其贷款只收取4%的利息。The news will have delighted detractors of the sch...