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 fusty old establishment refused to recognise the demand for popular music.这一古板的老旧机构拒绝承认人们对流行音乐的需求。A young Moroccan stopped by police refused to show his papers.一位被警察拦下的摩洛哥青年拒绝出示他的证件。The landlord refused to serve him ...