气流一直从我们身边呼啸而过。The air was rushing past us all the time.强冷气流从山上疾掠而下。Blasts of cold air swept down from the mountains.周四，南极气流给智利南部带来了刺骨的严寒。Antarctic air brought biting cold to southern Chile on Thursday....
Butyraldehyde 1,2 proparediol acetal was synthesized by using stannous chloride as catalyst.以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride as catalyst.以非质子...
Bob had to touch up the exterior paintwork where it was necessary.鲍勃要给所有外表需要修饰的地方上油漆.Covert action was deniable; a Pentagon program would not be ( Bob Woodward )偷偷摸摸的行动是可以否认的; 而五角大楼的行动却是有目共睹的 ( 鲍勃伍德沃德 )Bob died of a hear...