If you were to make that change you would find that the molecule now has completely different biological and chemical properties.

如果要做出这样的变化,你会发现,分子的生物形状,和化学性质完全改变了。

麻省理工公开课 - 化学原理课程节选

By putting it in a function bug if I find a bug and I change my program I can just run the function again.

把我输入的值放到一个函数里,如果以后我在程序中发现了一个,并对程序进行更改的话，我可以直接。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, if we took the case of nitrogen, if we add an electron to nitrogen and go to n minus, we find that the change in energy is 7 kilojoules per mole.

如果我们以氮为例，如果我们给氮增加个电子令它变成-1价的氮，我们会发现能量的变化是，7，千焦每摩尔。

麻省理工公开课 - 化学原理课程节选

Change the independent variable, find the change in the function, take the ratio and that's the derivative.

改变自变量,算出函数的变量,计算比值,这就是求导

耶鲁公开课 - 基础物理课程节选

And if I do that then I can find out the change in enthalpy of this reaction. It's just going to be the heat of formation of these three moles of water, minus the heat of formation of the iron oxide. OK.

我就能得到这个,反应的焓的变化,它就是三摩尔水,的生成热，减去氧化铁的,生成热，好。

麻省理工公开课 - 热力学与动力学课程节选

Here is the five dollars, we're going to tear this into nine pieces, except I'd get arrested and deported if I did that, so we're going to find a way to break this into change later.

这是5美元,我要把它撕成9份,但我会为此被捕然后被驱逐出境的,所以待会儿我会想办法把它换成零钱

耶鲁公开课 - 博弈论课程节选

Then again, you will find the evolution of the planetary motion, because the rate of change of the rate of the change of the position is connected to the position.

同样地,这就是行星运动的演化过程,因为行星位移的变化率的变化率,与它的位移有关

耶鲁公开课 - 基础物理课程节选

Well basically, all I'd have to do is go through and find every place I checked the constraint, and change it. To incorporate the new constraint.

比较简单，在最上方，基本上,我做的所有事情就是遍历，整段代码然后找到我对比。

麻省理工公开课 - 计算机科学及编程导论课程节选

And because there is an explicit relationship between u, delta u, q and w, you can always find the easy way to derive the change in internal energy or the heat or the work.

因为Δu，q和w之间,有明确的关系，一般来说,内能或热或功的变化,易于计算。

麻省理工公开课 - 热力学与动力学课程节选