The weight of the residue (W4) was recorded and percent dispersibility calculated using Equation 2.

的重量残留（ W4号）的记录和百分之分散计算方程2 。

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The theoretical formula about vacuity in vacuum tube and pore-water pressure at the observation point was obtained in this paper by using equation of gas state and equilibrium equation.

根据气体状态方程和平衡方程，推导出在某点真空表反映的真空度值与孔压计反映的孔压差的理论关系式。

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Lens equation is derived by using Fermat's principle.

用费马原理推导了透镜的物像公式.

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And the reason is, and this will come up on the problems and a lot of students end up using this equation, which is why I want to head it off and mention it ahead of time, we can't use an equation because this equation is very specific for light.

原因是，很多同学在解题时,都会用这个方程，所以我要,事先提醒你们一下,我们不能用这个方程，因为它只对光是用。

麻省理工公开课 - 化学原理课程节选

So, what we say here is we need to take a step back here and come up with an approximation that's going to allow us to think about using the Schrodinger equation when we're not just talking about hydrogen or one electron, but when we have these multi-electron atoms.

所有我们这里要说的是,我们需要退回一步,做一个近似,那样可以使我们用,薛定谔方程来考虑,让我们不是仅仅在讨论氢原子或者,一个电子的时候，而是多个电子的原子。

麻省理工公开课 - 化学原理课程节选

So, we just want to appreciate that what we'll be using in this class is, in fact, the solutions to the Schrodinger equation, and just so you can be fully thankful for not having to necessarily solve these as we jump into the solutions and just knowing that they're out there and you'll get to solve it at some point, hopefully, in your careers.

所以，我们仅仅想要鉴别,将会在这门课中用到的，事实上就是薛定谔方程的解，而且你们可以非常欣慰,因为你们没有必要去,解这些方程而是直接用它们的解,并且知道这些解出自那里,希望你们在学习生涯中。

麻省理工公开课 - 化学原理课程节选

Google's more than 10, 000 networked computers crawl through an index to those 3 billion pages, rank them using an equation that includes 500 million variables and spit out up to a few thousand listings.

FORBES: All Eyes on Google

You see, the credit crunch had almost nothing at all to do with those derivatives, the options and futures, that we value using the Black-Scholes equation.

FORBES: Black-Scholes Didn't Cause the Financial Crash

We feed the factors into the equation, measuring them using forecasts for 2005 where possible (in four cases) and latest data for slower-changing indicators, such as family life and political freedom.

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