It amounts to 2 to 3% of calories for the average consumer, and as I mentioned, Trans fats are not so good.

平均每位消费者,有2-3%的热量来自反式脂肪,正如我所说,反式脂肪不那么好

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Then you can look at the number of calories per --from fat that's offered in the food.

下面能看出食物中有多少热量来自脂肪

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选