Colour stability of coker gas oil has been improved by DMF extraction.以二甲基亚砜为萃取溶剂,用溶剂萃取的方法提高焦化柴油的颜色安定性.The coker gas oil was refined by benzyl alcohol extraction.以苄醇为溶剂,用萃取方法提高了焦化柴油的质量.Tell Colonel Coker, I am investigat...
宁做自由民之首,不居贵族之末.Better be the head of the yeomanry than the tail of the gentry.唯有自由民所生的男性,方可参加奥运会竞赛.Only freeborn male citizens could take part in the Olympic Games.英国人, 像个自由民一样,经由自己所喜欢的途径上天堂.An Englishman, like a freeman...