It used to be that there was zero inflation if you define it with respect to gold and they were really true to that zero inflation in terms of gold.

如果你用金子来定义它,那从来没有过通货膨胀,这是事实,就金子而言没有过通货膨胀。

耶鲁公开课 - 金融市场课程节选

You know, if you want to measure the potential energy of something in a gravitational field, you have to define the zero somewhere, right, because it's arbitrary. You can set it anywhere you want. It's the same with enthalpy.

你知道，如果你想测量重力场,中某种东西的势能，你需要，在某处定义一个零点，对吧？,因为势能的值是任意的,你可以把它设定在。

麻省理工公开课 - 热力学与动力学课程节选

And when we're talking about the amplitude of the wave, we're talking about the deviation from that average level. So, if we define the average level as zero, you can have either a positive amplitude or a negative amplitude.

当我们讨论一个波的振幅时,我们说的是偏离平均位置的量,如果我们把平均位置,定义为零的话，那幅值不是,正的就是负的，有时候人们在。

麻省理工公开课 - 化学原理课程节选

If you were to say to me, what do you think is the most important thing, however you define thing, that has changed the character of life in the United States in the twentieth century, I would say the disappearance of farmers.

如果你问我,我认为什么才是,最重要的东西,你认为是什么,在二十世纪改变了,美国人的生活方式,我会说是农民退出了历史舞台

耶鲁公开课 - 古希腊历史简介课程节选