How many moles of gas are there in each case, in reactants and products? If that changes, of course you know that the pressure in there is going to change at constant volume if the amount of gas in there is changing.

在反应物和生成物中，各有多少摩尔的气体？,如果它发生了变化,当然在等体条件下，如果气体的总量,发生了变化，压强也会发生变化。

麻省理工公开课 - 热力学与动力学课程节选

And we can actually better visualize this if we plot how that energy changes as a function of internuclear distance.

而我们就能更清楚地看到这些，如果我们画出,能量随核间距的变化曲线。

麻省理工公开课 - 化学原理课程节选

But if you think of the time span about 900 to 700 B.C., that is, when these changes are taking place.

但是如果你发现它发生在,大约公元前900年到700年之间时

耶鲁公开课 - 古希腊历史简介课程节选

The other beauty about - beautiful thing about proteins is that if you make subtle conformational changes, often those changes are reversible.

蛋白质的另一个美妙之处就是,如果蛋白质发生一些小的构像改变,这些改变通常是可逆的

耶鲁公开课 - 生物医学工程探索课程节选

If you have an isobaric you're going to have to calculate where the energy changes, and that's a calculation that's likely on the homework and very like on an exam as well, too.

在等压过程中,我们需要计算能量的变化，我们在作业,和考试中,就会遇到这类问题。

麻省理工公开课 - 热力学与动力学课程节选

And what this means is that common sense tells us that somebody can be the same person even if their body undergoes radical and profound changes.

这也就是在说,普遍观点告诉我们,一个人,即使经历了身体上的巨变,也依旧是原先的那个人

耶鲁公开课 - 心理学导论课程节选

But it's all different degrees of terrible, if you will, because so many people in the population share that biological vulnerability and when the environment changes, we have the problems.

只要愿意,这造成的恐慌程度是不同的,因为在人群中有很多这样的群体,他们都有这种生物易损性,当环境发生变化时,就会出现问题

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选