以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 proparediol acetal was synthesized by using stannous chloride as catalyst.以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using st...
The hills are largely carboniferous limestone, which is quarried at several sites.从多处遗址的挖掘来看, 这片丘陵大部分属石炭纪石灰岩.In Early Carboniferous, Tianshan mountains entered an intraplate evolution stage.从石炭纪开始天山地区进入陆内演化阶段.WHERE HAINA...
The ill - doings of the fascist chieftain redounded upon himself.法西斯头子干的种种坏事使他自食其果.The chieftain of that country is disguised as a benefactor this time.那个国家的首领这一次伪装出一副施恩者的姿态。The enemy chieftain was opposed and deserted b...
那匹马前蹄腾空向后仰，把骑手摔了下去。The horse reared and threw off its rider.马蹄在泥地里留下了深深的蹄印。The horse's hooves left deep indentations in the mud.他甩了个响鞭，马儿就奋蹄向前奔去。He cracked his whip and the horse leapt forward....
他其实并不太懂掷标枪.He didn't really know very much about javelin throwing.在掷标枪项目中,她掷了60米远.She achieved a throw of sixty metres in the javelin event.哈丽特掷标枪得了亚军.Harriet came second in the javelin....
好运就是当机会来临时，你早已做好了准备。Good luck is when an opportunity comes along and you're prepared for it. 你需要一锅汤来煮。You will need a pot of broth for poaching.你可以随时来医院。You are welcome to visit the hospital at any time....