food preservative

例句：

1. 1. To extend the shelf life of fresh meat, it's often used as a food preservative.
   为了延长新鲜肉类的保质期，它常被用作食品防腐剂。
2. 2. The use of food preservatives has been debated in recent years due to concerns about their safety.
   近年来，由于对食品安全的担忧，食品防腐剂的使用一直备受争议。
3. 3. The manufacturer claims that their product contains only natural food preservatives without anysynthetic additives.
   制造商声称其产品仅含有天然的食品防腐剂，不含任何合成添加剂。