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...
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....