I need to get to Lyon by nightfall...我需要在黄昏前到达里昂。I started work at dawn and returned only at nightfall.我披星戴月地工作。I need to get to Lyon by nightfall.我需要在黄昏前到达里昂。They were trying to make New Orleans by nightfall.他们力图在黄昏前赶到新...
介绍了丙二酰氧基硼氢化钾的制备及其原位与烯烃的选择性硼氢化.The preparation of potassium malonyloxyborohydride in situ and its selective hydroboration alkene are described.叙述了丙二酰氧基硼氢化钠的制备及其原位与烯烃的选择性硼氢化反应.The preparation of sodium malonyloxyborohydrid...
女性有时因过度使用磨砂膏而损伤了皮肤。Women sometimes damage their skin by going overboard with abrasive cleansers.这种新护肤香膏受到了 中年 妇女的欢迎.The new skin balm was welcome by middle - aged women.医生给伤口涂了些油膏, 伤口很快就愈合了.The doctor applied an unguent ...