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....

“变质”的英语可以翻译为：go bad，deteriorate，[地]metamorphism，[冶]modification，metamorphose ...

“变质”的拼音为：biàn zhì...