他下午三四点时返回了。He returned midway through the afternoon.有时我甚至早上四点都打电话。Sometimes I'd even call up at 4 a.m.每天早上四点起床简直是活受罪。Getting up at four o'clock every morning is sheer purgatory....
给出了Alberta4种沥青质和ColdLake瓦斯油的结构基团分析结果.The results for Alberta asphaltenes and Cold Lake gas oil are presented.封氮储存可明显抑制沥青质的增长.The presence of nitrogen inhibits the increase of asphaltenes in slurry oil.三沥青矿原油: 指自沥青质矿物提出之原...