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...
我母亲从小接受严格而规范的教育。My own mother was brought up very strictly and correctly.他们对严格行为规范的坚决主张their insistence on strict standards of behaviour最后, 但当然不是微不足道的, 是工作和道德规范的问题.Last, but certainly not least, are the issues of steward...