It means that the properties of the system, the properties that describe the system, don't change in time or in space.

它的意思是指，用以描述系统的性质，不随时间或空间改变。

麻省理工公开课 - 热力学与动力学课程节选

whenever you want to express what you are doing at a particular moment in time.

当你想表达在某一时刻你在做的事情时，你都可以用这个句型。

I'm ~ing 课堂 - SpeakingMax英语口语达人

I'm going to read passages quite a bit today, since some of you may not have been able to get the RIS packet in time, it being shopping period.

会怎样，可能有同学没拿到课件,我会多讲些，由于还没步入正轨。

耶鲁公开课 - 1945年后的美国小说课程节选

This goes back in time from the text we were discussing last time in the teens and twenties to 1901.

这要回到我们上次课所讲,他年少时直到1901的那段时期。

耶鲁公开课 - 现代诗歌课程节选

So, that translation causes people to believe that ; The story is giving me an account of the first event in time forward; But it's actually a bad translation.

因此，这种翻译让人们相信,这个故事将讲述时间存在以来的第一件事;,但事实上这是一个有误的翻译。

耶鲁公开课 - 旧约导论课程节选

He also knew where the candy was going to land, but he couldn't get his hand there in time.

这名同学也知道糖的落点,但是他没能及时的接住

耶鲁公开课 - 基础物理课程节选

Milton tells himself to run, and naturally he would have to run fast indeed in order to arrive at a moment in time that had already occurred before he even set out!

弥尔顿告诉自己要跑起来了，而且他也确实不得不跑的很快,从而准时到达,他刚出发时就已经存在的目的地！

耶鲁公开课 - 弥尔顿课程节选

Parole is the unfolding in time of a set of possibilities given in space, that set of possibilities being what Saussure calls "langue."

个人语言是一系列以一定时间顺序排列的,语言的可能的组合，而语言则是一个特定群体共享的“

耶鲁公开课 - 文学理论导论课程节选

It's not done in time for you to read but I think I will have it done at some time during this semester.

但现在还无法读到,因为还未完成,但是我想这学期会完成这本书

耶鲁公开课 - 金融市场课程节选

So I think at least in our own case, it's not that I wish things were different, but I know we have to constantly balance and reinforce and build and sort of reinforce the behaviors we need in whatever business at that point in time.

所以我想至少对我们而言，并不是我希望事情能够有所不同就可以的，但是我知道必须不断的作出平衡,并加强，创立，再加强自身,在这个时期不论从事什么都必须这样做。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

Because what you don't see in this file is any code a that actually says put a letter of the alphabet at the top left hand corner of the screen and then put the next character to the right in other words, I'm taking for granted at this moment in time that my computer knows how to print something to the screen.

就是这些你在本文件中看不到的一些代码,实现了将首字母,放在屏幕的左上角,然后把其他字母加在其右边，我想当然地认为,我的电脑知道如何打印相应信息到屏幕上。

哈佛公开课 - 计算机科学课程节选

So, that's how far east they get and in time the Carthaginians also cross over into Spain and they control some portion of the Spanish coast closest to Africa.

这就是在东部,希腊人所能到达的最远之地,同一时间,迦太基人进入到西班牙,并控制了西班牙,靠近非洲的部分海岸

耶鲁公开课 - 古希腊历史简介课程节选

If i would go back in time and give myself one piece of advice as undergradute, it would be take pride in your decisions and hardwork, but not in your gifts.

如果时光倒流,我能为本科时期的我,提个建议的话,我会说，为自己作出的决定和勤奋工作，而不是自己的天赋感到骄傲。

普林斯顿公开课 - 领导能力简介课程节选

And the mathematics of that equation involved a double derivative in time of x 0 plus some constant times x equals zero with some constraints on it.

那个数学方程式,包括了x对时间的二阶导数,加上常数乘以x等于,还有一些限制条件。

麻省理工公开课 - 固态化学导论课程节选

Tellegen Now by the way Lykken and Tellegen were interviewed recently in TIME magazine issue of happiness.

最近Lykken和,受到《时代》杂志的采访，谈“快乐“问题。

哈佛公开课 - 幸福课课程节选

I was in an early time in the White House.

我在白宫工作开始得很早。

普林斯顿公开课 - 国际座谈会课程节选