Gil rose and went to his bookcase and took down a volume.吉尔站起身，走到书架跟前，取下一本书。Gil downed his food wordlessly, his attention far away.吉尔一声不吭地吃着，心已在千里之外。Gil was white and trembling with anger.吉尔脸色发白,气得直发抖....
叶绿素的分子结构已经搞清, 它是由卟啉组成的.The structure of the chlorophyll molecule is known . It consists ofporphyrin.碱性氮化物包括吡啶和喹啉.The basic nitrogen compounds include pyridines and quinolines.三 ( 8- 羟基 喹啉 ) 铝 ( Alq3 ) 是有机电致发光器件的 基础材料.Alu...
"Why didn't you tell me before?" asked Hunter harshly.“你为什么不早告诉我？”亨特厉声问道。Chris laughed harshly.克里斯笑得很刺耳。The grit beneath her soles grated harshly on the wooden deck.粘在她鞋底的沙砾蹭在木甲板上发出刺耳的声音....