诸如汽车之类的燃料燃烧不是这种热量增加的唯一来源。

The burning of fuel, such as by cars, is not the only source of this increased heat.

youdao

因为人们比30年前更加懒散，快餐的流行也给了人们健康程度降低但热量增加的选择。

People are less active now than they were 30 years ago, and the prevalence of fast food has given people less healthy, more energy-dense options.

youdao

因为人们比30年前更加懒散，快餐的流行也给了人们健康程度降低但热量增加的选择。

People are less active now than they were 30 years ago, and the prence of fast food has given people less healthy, more energy-dense options.

youdao

So you could have--be consuming fat that is in itself good for heart health let's say, or maybe protective against cancer in some ways, but it's also adding calories to the diet, so you want to have the optimal amount of fat and not over-consume it because of the calories.

所以你可能是在食用,有益于你心脏健康的脂肪,打个比方,又或是在某种程度上可以抗癌,但它也给你的饮食增加了热量,因此为了减少热量应该食用适量,而非过量的脂肪

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选