Current thinking is that women distribute the fat below the waist because it's a fat storage depot for pregnancy and lactation.

流行观点认为女性,把更多脂肪储存在腰以下,是为怀孕和哺乳提供脂肪储存

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

There can be a supply of them, a storehouse of them that can build up in the body, and so day-to-day fluctuations become less of a problem with fat soluble then water soluble vitamins, because the body can go grab them from a storage depot, if you will.

从而在体内建立起一个供应源,一个脂溶性维生素仓库,这样一来,相比起水溶性维生素,脂溶性维生素的浓度不会每天剧烈波动,因为机体可以任意取用体内的储存

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选