system model establishment的用法和樣例：
例句
- The first step to system modeling and control is input selection.
系統建模與控制的第一步是輸入變數選擇。 - Generally the inverted pendulum system is modeled as a linear system, and hence the modeling is valid only for small oscillations of the pendulum.
通常倒立擺系統建模成一個線形系統，因此模型只對小幅度擺動的擺才有效。
