And if you want to run a furnace and provide energy that's an extremely important thing to be able to calculate.

如果你点燃壁炉，提供能量,计算这个量,是非常重要的。

麻省理工公开课 - 热力学与动力学课程节选

It's very important because it provides-- does provide energy but it helps with muscle building and with the manufacturing the body does of its own proteins, and therefore, is a vital part of the diet.

蛋白质非常重要,因为它能提供,的确能提供能量,但它也能帮助肌肉塑形,参与身体内自身蛋白的合成,因此是饮食中不可或缺的组成部分

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选