This law is represented by an equation that many high schoolers encounter in physics class. It goes as follows.
这条定律可由如下等式表示，许多中学生在物理课上都会学到该等式。
2
First, examine this relationship from the Book class side of the equation.
首先，从Book类这一侧分析这种关系。
3
This paper gives an exact solution for free vibration of a physically nonuniform straight bar with varying section by the use of a class of integrable linear ordinary differential equation.