尽管很多食品天然富含水杨酸酯，过去几十年中食品加工公司仍然在食品中加入它来作为防腐剂。
Although many foods are naturally rich in salicylates, for the past several decades food-processing companies have also been adding salicylates to foods as preservatives.
该公司称，所有的巧克力在生产中均未添加防腐剂和化学添加剂，只是加入了一些当地常用的香料、坚果和蜂蜜。
All chocolates are produced without preservatives or chemical additives with a range of locally popular spices, nuts and honey, the company says.
你可以加入10滴液态胶粒银作为天然的防腐剂。
You can also add 10 drops of colloidal silver as a natural preservative.
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