The diisobutyl dicarboxylate was prepared by using acid and isobutanol as material and acid as catalyst.以二羧酸和异丁醇为原料,用硫酸作催化剂,合成二羧酸二异丁酯.Butyl cinnamate was synthesized from cinnamic acid and butyl alcohol using tungstosili...
Acid rain is not straightforwardly attributable to the burning of coal.酸雨并非简单地由烧煤造成。Nor is acid rain always, and universally, a bad thing.酸雨也并非在任何情况下都是坏事。This comedy of contemporary manners is told with compassion and ac...
The crude, wet benzoate ( 118 grams ) was dissolved with reflux in 1 , 400 ml methanol.将粗制 、 湿的苯甲酸酯 ( 118克 ) 回流着溶于1400毫升甲醇中.The crude, wet benzoate ( 118 grams ) was disslolved with reflux in 1,400 ml methanol.将粗制 、 湿的苯甲...
The beautifully made briefcase is a snip at £74.25.这个做工精美的公文包售价才 74.25 英镑，可谓物美价廉。He has now begun to snip away at the piece of paper...现在他已经开始剪这张纸。I sit down, thread a needle, snip off an old button.我坐下来，穿好针，剪下一枚旧纽扣。snip...
The municipal government will do something about the firetraps in the city.市府将对城里容易失火的建筑物采取防患措施.The decor was reminiscent of a municipal arts-and-leisure centre.这种布置让人想起都市里的艺术休闲中心。The one bright spot for municipal Wi - F...