The carbon is electrophilic centre.碳是亲电的中心.It will become deepen to the students'recognization in mechanism of Aryl electrophilic substitution.这些问题的讨论将深化学生对芳烃亲电取代反应机理的认识.The rate constants of radical and electrophil...
自动化会使工作周缩短，也更为灵活。Automation would bring a shorter, more flexible working week.他将世界纪录缩短了10秒。He has knocked 10 seconds off the world record.受伤的问题有可能缩短他的职业生涯。Injury problems could shorten his career....
On both days, three very different trains will be timetabled.这两天都将安排发出3列时刻不同的火车。Opie is timetabled to work a four-day week.奥佩被安排每周工作4天。The meeting was timetabled to begin at two o'clock.会议定于两点召开....
Franklin and his thirteen-year-old son somehow got separated in the crush.富兰克林和他13岁的儿子在人群中被挤散了。Every-where he went he was mobbed by a crush of fans.他所到之处都有成群的歌迷簇拥着他。Peel and crush the garlic.把蒜剥皮并捣碎。...
Many aqueducts from ancient Roman times still stand today near the Mediterranean Sea.许多古罗马时代的引水渠至今还保留在地中海附近....a nationwide system of aqueducts to carry water to the arid parts of this country.将水输送到该国干旱地区的全国性导水系统Central ...