“变质”造句

我们都知道油脂变质后会发臭。
We all know that fats spoil by becoming rancid.

有些生物会导致食物变质并引起食物中毒。
Some organisms are responsible for spoiling food and cause food poisoning.

他们买了太多牛肉，有些都变质了。
They bought so much beef that some went bad.