ob向 + es吃 + ity构成名词，表状态和性质等 -> 一直吃就会变成肥胖的样子 -> obesity 肥胖Childhood obesity is becoming more and more common.
儿童肥胖越来越普遍。
The country has the largest number of people with obesity in the world.
该国是世界上过度肥胖症患者最多的国家。
Dieting and exercise are the most effective ways to deal with obesity.
节食和运动是应对肥胖最有效的方法。
A diet that is high in fat and sugar can lead to obesity.
高脂肪和高塘饮食会导致肥胖症。
