Phenyl ( or polyphenyl ) substituted epoxides serve as excellent precursors to phenyl ( or diphenyl ) carbenes.某些苯代 ( 或多苯 ) 环氧乙烷是制取带苯环 ( 或二苯 ) 碳烯的极好原料.The epoxides were obtained with up to 90 % yields in the reaction sys...
He and his father, according to local gossip, haven't been in touch for years.当地风传，他和父亲已多年未联系了。They haven't got an invite to the wedding.他们还没收到参加婚礼的请柬。The library is a haven of peace and quiet.图书馆是个平和而安静的去处。"Yo...
The Strand is one of London's busiest and most affluent streets.斯特兰德街是伦敦最繁华、最富足的街道之一。a very affluent neighbourhood富人区It's a fallacy that the affluent give relatively more to charity than the less prosperous.富人比...