What this equation merely says is that the present value of your remaining payments is always equal to the mortgage balance.

这个等式说明了,剩余偿还额的现值,就等于抵押贷款的余额

耶鲁公开课 - 金融市场课程节选

Let's quantify the energy value. If you go through and solve for energy, you will get this equation.

我们来确定一下能量值，如果你试图寻找,解决能量问题，你能得到一个方程式。

麻省理工公开课 - 固态化学导论课程节选

So, what we have left in our equation is only one part that n we haven't explained yet, and that is that n value.

现在方程里只剩下一个常数,我们还没有解释，这就是。

麻省理工公开课 - 化学原理课程节选

Then go to the x equation and demand that this be equal to the desired x value and find the time.

然后列出关于 x 的方程,令这个式子等于给定的 x,并求出时间

耶鲁公开课 - 基础物理课程节选