防腐处理

例句：

1. 1. The food was treated with a special preservative to keep it fresh for months.
   这食物被一种特殊防腐剂处理，以保持新鲜数月。
2. 2. The old car needed an anti-aging treatment before being sold.
   这辆旧车在出售前需要做一次抗衰老处理。
3. 3. The scientist used a corrosion protection coating on the metal surface to prevent it fromrusting.
   科学家在金属表面涂上一层防腐蚀保护涂层，以防止生锈。