The flesh of his cheeks seemed to have yellowed.他似乎有些面色发黄。The white shirt was yellowed with sweat.白衬衫被汗水渍黄了.The leaves of the book were yellowed with age.书页因年久而变黄....
The necessary material of 2 - ( 2 - methoethyl ) acetaldehyde diethyl acetal was synthesized in addition.另外还合成了必需原料 2- ( 2- 甲氧基乙氧基 ) 乙醛二乙醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride...