fat hardening

例句：

1. 1. The meat was so fatty that it could not be eaten by humans.
   这块肉太肥了，人类不能吃。
2. 2.Fatty foods are often high in calories and should be consumed in moderation.
   高热量的食物通常应该适量食用。
3. 3.The process of fat hardening is a natural part of the aging process.
   脂肪硬化是老化过程的一个自然部分。