既然人们的卡路里需求量不一样，这个统一标准显然只能做参考。

Since calorific needs differ from person to person, a universal number is clearly only a guide.

youdao

如果生产总量低于需求量，粮价势必上升，即使生产出来的“卡路里”有剩余。

If output falls below demand, prices will tend to rise, even if "excess" calories are being produced.

youdao

Okay, so once you reach 2 000 calories you don't want to put anything else in.

好的,所以你一旦摄入了2000卡路里,教授在上节课曾提到2000卡路里是正常成年人平均一天的卡路里需求量 你就不会再想吃别的东西了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选