Her bead necklaces and bracelets jangled as she walked.她的珠子项链和手镯在她走动时叮当作响。The lamplight struck a gleam from her bracelets.她的手镯在灯光的照射下闪闪发亮.Her bracelets were going clack-clack-clack, she was shaking so hard.她的手镯哗啦哗啦直响，她抖得...
这种反应构成了制备芳基环丙基乙炔的有效方法.This sequence constitutes an efficient method for preparing arylcyclopropylacetylenes.环丙烷基硅醚在卤化锌的作用下能够与硅胶反应生成环丙基醇.Trimethylsilyl cyclopropyl others can react with the gel the cyclopropanols when Lew...
早期的天文学家认为我们的星球是宇宙的中心。Early astronomers thought that our planet was the centre of the universe.人类对于宇宙的了解已经大为增加。Mankind's knowledge of the universe has increased beyond measure.宇宙的浩瀚难以捉摸。The immensity of the universe ...