Butyraldehyde 1,2 proparediol acetal was synthesized by using stannous chloride as catalyst.以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride as catalyst.以非质子...
He was so happy communing with the dolphin in Dingle Bay.他在丁格尔湾与海豚交流的时候特别开心。Like the best stories, this one may yet have a happy end.就像最精彩的故事那样，这个故事也许仍会有个美好的结局。I wasn't too happy with what I'd written so far.我对...