烯空气跟空气十分近似.Olefin gas closely approximates air.所有的主要难点都涌现在烯酮 ( 1 ) 的合成中.All the chief difficulties crop up in the synthesis of the enone ( 1 ).某碳氢化合物已知可能是烯烃或是烷烃.A hydrocarbon was known to be either an alkene or alkane....
In the gymnasiums of Beijing and Shanghai, there were grounder competitions.上海 、 北京都有健身房里玩地滚球的比赛.The grounder went for a hit, and Damon scooted to third.当这滚地球穿出内野, 大门直奔三垒.Maiga: The International Grounder Federation was ...
无标志的预约型出租车沿街拉客是非法的。Minicabs are prohibited by law from touting passers-by for business.瓦莱丽在排球、篮球和曲棍球三个项目上获得了佩戴校名首字母标志的荣誉。Valerie earned letters in three sports: volleyball, basketball, and field hockey.无标志的电话预订出租车沿街拉客是非法...