甲烷和丙烷是烷烃。Methane and propane are alkanes.丙烷气钢瓶a propane gas cylinder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....
Nancy woke at dawn.拂晓时分南希醒了。Dawn shimmers with spider filaments, proof that late hatches of spiderlings have the instinct to travel.黎明之际, 闪光的蜘蛛丝表明晚生的蜘蛛有旅行的天性.The truck pulled out of the lot, its bulk unnerving against th...
In that case he and she must have plotted this together.在这件事上,分明是他在与她通同作弊.They plotted out the farm.他们把农场划成若干小块.They plotted to kill the politician.他们图谋要杀掉那位政治家....