"Too much weight gain, and particularly accumulation of fat in the abdomen area is problematic."

VOA: standard.2010.07.08

Fat has twice the calories per unit weight that protein or carbohydrate sugar has, as a consequence, has the greatest survival value.

单位重量中脂肪的热量含量,是蛋白质和碳水化合物的两倍,因此,脂肪才是最能维持生存的物质

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And if you want to lose body fat as far as that kind of weight, that's the way to do it.

如果你想要减掉脂肪和重量，这就是方法。

要拥有好身材 - SpeakingMax英语口语达人

As I mentioned before, fat has twice the calories per unit weight as protein and carbohydrate.

如我之前所说,单位重量中脂肪的热量含量,是蛋白质和碳水化合物的两倍

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选