You hook one end of the spring to a wall and you pull it from rest by some amount and you attach the one kilogram mass to it.

你把弹簧的一端固定在墙上,然后拉伸一段距离,接着你把 1 千克物体固定在上面

耶鲁公开课 - 基础物理课程节选

Then you look at-- to the right of the line with meat, for example, only 30% percent of people are eating the recommended amount of meat, the rest are eating too much.

然后你看到,比如,右边肉类一项,只有30%的人肉类摄入达标,剩下的全都吃得过量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选