Sodium ethylate was used as catalyst in Baker - Venkataraman of cyclization, and all factors were studied. 环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂, 研究了影响反应的各个因素.
The vice-president is trying to usurp the president’s authority.副总统想要夺取总统的权力。Did she usurp his place in his mother's heart?...她取代了他在他母亲心目中的地位吗？The vice - president is trying to usurp the president's authority.副...
她已经戒了毒，并且认识到了生命可贵。She's kicked her drug habit and learned that her life has value.“我认识你。”他平淡地说道，就事论事，不带任何感情。"I know you," he said flatly, matter-of-fact, neutral in tone.他们被劝服，认识到了和平的好处。They have been per-suaded of ...