亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process.偶氮杂环丙烷是一类重要的 、 环内张力颇大的化合物.The diazirines are interesting , highly strained ring systems.在最佳反应条件下,环丙烷羧酸异丙酯的产率达92%.Under the opti...
她沉醉于婚后幸福的浪漫幻想。She clings to a romantic fantasy of wedded bliss.迈克尔抓着她的手臂，沉醉于音乐中。Michael held on to her arm, losing himself in the music.当时我沉醉于生活中的精彩刺激。I felt drunk with the excitement of life....
I think they're just bumming around at the moment, not doing a lot.我想他们目前只是在四处闲逛，没做多少事。He was probably bumming his way home.“他多半是不花钱搭车回家.He had been bumming around the park all day.他在公园里荡了一整天了....
A mere tendeney to produce a rudiment is indeed sometimes thus inherited.事实上,产生原基的倾向,有时的确是这样遗传的.Meckel's diverticulum is the rudiment of the embryonic yolk sac.麦克尔憩室是胚胎黄囊的未发育完全器官.The development of agriculture of an...
We must be realistic in our self - estimation, neither being conceited nor belittling ourselves.我们对自己的估计应该实事求是, 不要自高自大,也不要妄自菲薄.I find it belittling to be criticized by someone so much younger than me.有个比我年轻许多的人批评了我,我觉得是小...
这种韧化玻璃只裂不碎.You can crack this toughened glass, but you can't break it.综述了晶须增韧陶瓷基复合材料的强韧化机制.The reinforcing and toughening mechanisms of whisker reinforcing ceramic matrix composites are reviewed in this paper.断口还发现有...