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

You can find the equation, but you've got to think a little bit before you solve everything.

你能写出方程式,不过在解题之前你最好能稍作思考

耶鲁公开课 - 基础物理课程节选