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....
她那暗色的嘴微微启开,露出洁白的小牙齿.Her dusky mouth was parted slightly to show tiny white teeth.船又静悄悄地向陆地蠕动, 船后留下长长一道暗色的浪迹.The ship crept in towards the land, silently, leaving a long dark track behind her.“月海”是圆形洼地,覆盖着暗色的松散物质,而不是坚硬的岩石...