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preservatives是什么意思

preservatives

英[prɪ'zɜ:vətɪvz] 美[prɪ'zɜvətɪvz]

n. 防腐剂( preservative的名词复数 )；

柯林斯高阶英汉双解学习词典释义

N-MASS

防腐剂；保护剂

A preservative is a chemical that prevents things from decaying. Some preservatives are added to food, and others are used to treat wood or metal.
例句
Nitrates are used as preservatives in food manufacture... 硝酸盐在食品加工业中被用作防腐剂。 Though the panels come pre-treated, they needed a final sealing with two coats of preservative. 虽然这些镶板运来时经过了预处理，但是还需要涂上两层防腐剂进行最后的密封。

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