由二苯并-1,3-二氧杂 - 环辛烷 -2- 羧酸经两步反应制得, 总收率70%. It was prepared by the reaction of 12 H - dibenzo [ d , g ] [ 1,3 ] dioxocin - 6 - carboxylic acid with acetoxime.
保罗·塞尚的绘画预示了20世纪初叶立体主义的兴起.The paintings of Paul Ce & 1 & zanne prefigured the rise of cubism in the early 20 th century.拿破仑像个巨人跨越19世纪初叶.Napoleon astride the early 19 th century like a giant.这个故事发生于20世纪初叶.The story happene...
The pump analogizes with the human heart.水泵被用来比拟人的心脏.Smybol analogizes rational idea with an intuition, and hint is its basic feature.象征是用一直观来类比理性理念,它的基本特征是暗示....
I can't say it justifies the price tag of £150.我认为它值不了150英镑。Their frequency of use both justifies and requires the memorization.频繁的使用需要记忆,也促进了记忆.In my judgement the present end justifies the means.照我的意见,只要目的正当,手段是可以...
They left by twos and threes.他们三三两两地离开.The students are coming into the classroom by twos and threes.学生们正三三两两地走进教室.They came in by twos and threes.他们三三两两地进来....