N, N - diethylaniline was synthesized under normal tempreture with tetraethyl ammonium hydroxide as phase transfer catalyst. 以苯胺和溴乙烷为原料,用四乙基氢氧化铵作相转移催化剂,在常压下合成N, N二乙基苯胺.
这位刚戴上胜利花冠的战斗英雄一枪没打就束手投降了.The fresh - crowned hero fell without firing a shot.他得摆好戴着月桂花冠的姿势.He had to pose wearing a laurel wreath.有时当果实成熟时也留有花冠的残余.Sometimes remnants of the corolla may also be present when the fruit is m...
Helicopters have been upgraded and modernized.直升机已经更新换代，装配了现代化设备。By 1985 the entire railway network will have been modernized.等到1985年整个铁路网就实现现代化了.He set about rebuilding France, and made it into a brilliant - looking mod...