Allene is an isomer of methyl acetylene.丙二烯是甲基乙炔的一种异构体.In the darkness, the machine gun spat a vindictive white light like an acetylene torch.机枪在黑暗中吐出一道凶厉的白光,活象一支喷火的乙炔吹管.In the high - pressure system both oxygen and acet...
This paper discussed three methods of producting vinyl etherspreparation from acetylene, dehydrohalogenation and acetals.论述了乙烯基醚类化合物的三种主要制备方法乙炔法 、 脱卤化氢法和缩醛热分解法.Allene is an isomer of methyl acetylene.丙二烯是甲基乙炔的一种异构体.In th...
The Ainu settlers in Hokkaido are the last remnant of a prehistoric race.北海道的阿伊努人是史前某个种族的最后残存者.Hokkaido crab meat relatively soft, gently suck the meat can be imported.北海道蟹的肉质比较松软, 轻轻一嘬,肉就可以入口.Except for Hokkaido, we don...
长裙子去年就不流行了.Long skirts went out last year.这里不流行台球.Billiards isn't popular in here.短裙几年前不流行了, 现在又再度流行了.Short skirts went out a few years ago, but they've come back again....