spoilage random fluctuation

例句：

1. 1.The spoiled food was unsafe to eat.
   变质的食物不能吃。
2. 2. The spoiled wine had gone bad.
   酒已经变质了。
3. 3. The spoilage of the food is a concern for many restaurants.
   食品的变质是许多餐馆关注的问题。