[C]acopyofaphotograph, map, picture, etc. thatismadesmallerthantheoriginalone(照片、地图、图片等的)缩图,缩版OPPenlargement[U, C](chemistry化学) thefactofaddingoneormoreelectronstoasubstanceorofremovingoxygenfromasubstance还原;去氧;脱氧➡ compareoxidation at oxidizeasaucemadebyboilingaliquiduntilitbecomesthick浓缩酱汁(将汤汁熬至浓稠而成)