1、A preservative shall be a substance that , when added to food is capable of inhibiting, retarding the process of decomposition , fermentation of foods .
2、A food conditioner shall be a substance which is added to food for a technological purpose to obtain the desired food .
3、An antioxidant shall be a substance which , when added to food , is capable of delaying or preventing the development of rancidity .
4、A flavor enhancer shall be a substance which , when added to food , is capable of enhancing or improving the flavor of that food .
5、Coloring substance shall be a substance that , when added to food , is capable of imparting color to that food .
非常谢谢。。。