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

This is a very good way to explain what you are doing at a given moment in time.

这个句型可以很好地解释在某一时刻你正在做些什么。

I'm ~ing 课堂 - SpeakingMax英语口语达人

The longing heart accumulates desires that become in time a kind of volatile waste, which can't be contained.

渴望的心聚集欲望,假以时日便成了,会挥发不能抑制的废物。

耶鲁公开课 - 现代诗歌课程节选

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

That's why we said on the personality theory,as we went ahead in time, once the P-functioning stops,I don't exist anymore.

这就是为什么根据人格理论的说法，随着时间流逝，人格功能停止，我也不再存在。

耶鲁公开课 - 死亡课程节选

What's shown in this diagram is the progress of the developing embryo as it travels in time, down the fallopian tube.

这张图上显示的,就是胚胎发育的过程,是按照它在输卵管中移动的时间排序的

耶鲁公开课 - 生物医学工程探索课程节选

She was, I don't know, ninety and she married some sixty-year-old Confederate veteran at some point in time.

她大概有,大概有,九十岁,她在某个时期嫁给了一个,六十岁的南部邦联老兵

耶鲁公开课 - 美国内战与重建课程节选

They're the result of millions of individual decisions at millions of points in time.

他说,"这些疾病是每时每刻,由每个人所作的决定导致的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

We study its unfolding in time.

所以，我们从一段时间上来认识语言。

耶鲁公开课 - 文学理论导论课程节选

You'll really begin to appreciate them in time.

你们要一遍一遍地去品味，欣赏它们。

耶鲁公开课 - 旧约导论课程节选

By our informal count, however, we and the Afghan commandoes we work with were stopped on 70 percent of our attempts because we could not achieve the requisite 11 approvals in time.

粗略估算了一下，与我们一道工作的阿富汗突击队,有70%的尝试都失败了,因为我们不能按时拿到所需的11个批准。

普林斯顿公开课 - 国际座谈会课程节选

What is naturally right what is right by nature in peace time will not be the same as what is naturally right or right by nature in times of war.

太平时的自然正当,天生的正当将非常不同于,战时的自然正当与天生的正当,正常情势的正当。

耶鲁公开课 - 政治哲学导论课程节选

If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.

如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上

耶鲁公开课 - 基础物理课程节选

> David: At some point in time, I'm going to have to have declared the variable as a float before I can then hand it to printf as the insertion value for that format strength.

>，大卫：在一个特定的时间，我将需要,声明float类型这样的变量,那样我就可以把它打印出来,像是格式化优点的插入值。

哈佛公开课 - 计算机科学课程节选

so then, yeah, I ended up coming out here just in time for everything to kind of crash

我最终来到了这儿，正赶上一切都垮了的时候。

迷上网页设计 - SpeakingMax英语口语达人

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