The obesity epidemic began in the 1980s, and many people attribute it to increased portion sizes and inactivity, but that can't be everything.

肥胖在20世纪80年代开始蔓延，许多人将其归咎于食物份量增加和缺乏运动，但这不可能是全部原因。

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They therefore require special attention when fighting the obesity epidemic.

因此，在与肥胖症流行进行斗争时，他们需要获得特别重视。

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Societal reasons for the childhood obesity epidemic.

儿童期肥胖症流行的社会原因。

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