preservative
adj
(used for) preserving (用来)保护的, 保存的
He painted the posts with a preservative liquid. 他在柱子上涂上了起保护作用的液体.
Salt has a preservative effect on food. 盐对食物有防腐作用. preservative, n [C, U]
(type of) substance usedfor preserving 保护剂; 防腐剂
food free from preservatives不含防腐剂的食品
Alcohol is used as a preservative in certain foods. 酒精用作某些食物的保护剂.
Preservative is usually added to tinned meat. 防腐剂通常加在肉类罐头里.