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....
a nasty officious little man讨厌、好管闲事的家伙When people put on uniforms, their attitude becomes more confident and their manner more officious.人们穿上制服后会信心倍增，也更爱管闲事了。They wouldn't welcome any officious interference from the...