obesity:
n. 肥大，肥胖
Childhood obesity is becoming more and more common.
儿童肥胖越来越普遍。
fat:
adj. 肥的，胖的；油腻的；丰满的
n. 脂肪，肥肉
vt. 养肥；在…中加入脂肪
vi. 长肥
This dress makes me look fat.
这衣服我穿着显胖。
Excess food is stored as fat.
多余的食物作为脂肪贮存起来。
The manager was fat and jolly.
经理胖乎乎乐呵呵的。
This ham has too much fat on it.
这块火腿肥肉太多。
