No, we call that work positive work. All right, so that means we need to put a negative sign right here, by convention.

历史上有过不同的习惯，这里我们规定,如果环境对系统做功。

麻省理工公开课 - 热力学与动力学课程节选

But overall, you want to make sure you have a healthy diet.

但整体上，你要确保你有一个健康的饮食习惯。

关于网络世界 - SpeakingMax英语口语达人

By tradition, they divide by 360, not 365, and so you understand that dealers of Treasury bills tend to quote "discounts."

习惯上他们除以360,而不是365,国库券的经销商,习惯于谈论"贴现"

耶鲁公开课 - 金融市场课程节选

It consists of the entire way of life the moral and religious practices the habits customs and sentiments that make a people what they are.

它包含了整个生命的模式,道德上与宗教上的实作，习惯,风俗与情感,等形塑人格的一些元素。

耶鲁公开课 - 政治哲学导论课程节选

You guys should get used to going to the class' website.

你们得养成上教学网站的习惯

耶鲁公开课 - 基础物理课程节选

Infinity is the force when we're thinking about it and our brains, negative infinity is when we actually plug it into the equation here, and the reason is the convention that the negative sign is just telling us the direction that the force is coming together instead of pushing apart.

说力有多大时，我们想到的,是无穷大，而方程解出来的,是负无穷，这是因为习惯上,我们用负号表示力的方向,是相互吸引而不是相互排斥的,所以我们可以用库仑定律。

麻省理工公开课 - 化学原理课程节选