n.防腐剂；预防法；预防药
adj.保存的；有保存力的；防腐的
It is used as a preservative in certain acid food products. 在某些酸性食物制品中它被使用作为防腐剂。
For the first, the best preservative to keep the mind in health, is the faithful admonition of a friend. 说到第一种，最能保人心神之健康的预防药就是朋友的忠言规谏。
用作形容词 (adj.)The fact is that ascorbic acid is only the preservative part of naturally occurring vitamin C. 事实上，抗坏血酸只是天然维生素C的能够保存的部分。
