The tramp produced a stump of candle from his deep pockets.流浪汉从深口袋里掏出了一截蜡烛。The light from my candle threw his elongated shadow on the walls.我的烛光将他拉长的影子投射在墙上。After drawing the curtains, she lit a candle.拉上窗帘后,她点燃了蜡烛。...
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....