The heptanal butyl mercaptan was synthesized with heptanal, sodium thiosulfate and 1 bromobutane as raw materials.以正庚醛 、 硫代硫酸钠和溴代正丁烷为原料,合成了正庚醛正丁硫醇缩醛....
"You must be expecting a young man," she teased.“你一定是在等哪位小伙子吧，”她揶揄道。We were expecting him home again any day now.我们期盼着他某一天再回家。I am expecting several important letters but nothing has arrived.我正在等几封重要的信件，可是一封都没到。...