So again, if you do a calculation where you're close enough to the ideal gas and you need to design your, if you have an engineer designing something that's got a bunch of gases around, this is a useful thing to use.

要研究近似理想气体的表现时,这个方程非常有用,下面再来看一个，对我们来说最有意思的,实际气体状态方程：,范德瓦尔斯方程。

麻省理工公开课 - 热力学与动力学课程节选

Some of those countries are really reliant on oil, ... so they really have to do-- they really should do a calculation of efficient portfolio frontiers.

有些国家过于依赖石油了，所以他们真的需要-,他们真的应该好好算一算,有效边界。

耶鲁公开课 - 金融市场课程节选

And in terms of using these equations in solving problems on the exam, and also using these constants, make sure if you think there might be any chance you're going to get any little part of a problem wrong or do a calculation inaccurately, you need to write out every single step of your thinking as you write out these problems.

而当你在考试过程中用这些公式,来解题时，加上运用这些常数，如果你觉得有可能,在某一小问上出错,或者出现计算错误，请务必把你的思路一步一步地都写出来,当你在答题的时候。

麻省理工公开课 - 化学原理课程节选

And I'm not expecting you to do that calculation here, because it involves the calculator, among maybe a piece of paper as well.

我并不期望你们去做这个计算,因为它需要一个计算器，也许还需要一张纸。

麻省理工公开课 - 化学原理课程节选

Sam All right. So, we'll move this up to the front in just a minute, but I'm going to explain how this experiment works and we'll do the calculation first before the excitement breaks out.

好的，这是她的女儿,被背带背她在胸前，这是Patti，Christie博士，好的，我们等会,会把它移到前面,但我要先解释下。

麻省理工公开课 - 化学原理课程节选

So let's do a sample calculation now using this Rydberg formula, and we'll switch back to emission, and the reason that we'll do that is because it would be nice to actually approve what we just saw here and calculate the frequency of one of our lines in the wavelength of one of the lines we saw.

让我们用Rydberg公式,做一个例题，我们回到发射上,这么做是因为这样,可以用我们看到的波长,来验证我们计算的频率。

麻省理工公开课 - 化学原理课程节选