The minerals are present in small amounts in food and as a function of body weight as well.

矿物质,在食物中所占比例非常小,在体重中所占比例也非常小

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

As we'll discuss in the class, and most of you probably know this, your body weight is a function of how many calories you take in and how many calories you burn off through metabolic processes but also physical activity.

我们将会讲到,而且你们中的大部分人可能也知道,你的体重随着卡路里的摄取量,和代谢中的消耗量而变化,还跟肢体活动有关

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选