All of us are really feeling the effect, and therefore the need to sign.

VOA: standard.2009.10.13

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

Others point to all the problems: the anachronisms, the general lack of specificity as a sign that these are composed quite late.

其他人则提出了各种问题：,时代特色，表述不够具体,由此推断这些创作得比较晚。

耶鲁公开课 - 旧约导论课程节选

"You had a very good feeling for what it was you were all trying to do together and I think that is a sign of a particularly good leader."

VOA: standard.2010.04.21

Just while you're reading that over, can I also make sure you've all got your legal forms and you're going to sign.

你们边读规则,我边督促你们去,签署授权书

耶鲁公开课 - 博弈论课程节选

Delegates have been in Barcelona all week to hash out a plan that would pave the way for 192 nations to sign a legally binding international climate deal next month.

VOA: standard.2009.11.06

It might be worth pausing over the variety of ways in which we can think of signs in language, all of which have to do with the way in which a given sign might be chosen to go into a speech sentence.

这也许值得尝试,为了理解语言和符号的关系，这一切都和符号怎样,被选择为一段话语的构成部分有关系。

耶鲁公开课 - 文学理论导论课程节选

Convention, OK, this negative sign is just a pure convention. You just got to use it all the time. If you use an old textbook, written when I was taking thermodynamics, they have the opposite convention, and it's very confusing. But now we've all agreed on this convention, and work is going to be with the negative sign here.

系统对外界做功的符号为负,这就是我们,在本课中的规定，纯粹出于统一符号的需要，有些教科书中，可能会使用相反的符号规定,注意不要混淆了，这门课上,我们将一直使用。

麻省理工公开课 - 热力学与动力学课程节选