If one of your goals is to lose weight, you will also need to change how and what you eat.

VOA: special.2010.06.08

Most everybody understands the basic concept of what a calorie is: you eat food, it delivers something that can affect your weight, and that something is divided into units called calories.

大部分人所理解的基本定义是,人们吃食物,其中某些物质影响体重,这种物质划分为小单位后称之为卡路里

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选