She was dancing while someone substituted at the piano.她在跳舞,别人代她弹钢琴.The synthesis methods of melatonin, related tryptaminetryptamine derivatives and substituted indoles are discussed.从人工合成的角度综述了美乐托宁及有关化合物色胺、色胺衍生物及吲哚衍生物的制...
由于场地积水太多比赛被取消了。The match is off because of a waterlogged pitch.排干矿坑里的积水不容易.It was not easy to drain the flooded mine.雨后路面到处是一坑坑的积水.The road was filled with puddles from the rain....