higher-order system的用法和樣例：
例句
- The compactness and utility of this notation becomes apparent when high order systems are considered.
當研究高階系統時，這種表示方法就顯得很緊湊和有用。 - Then, it is possible to define a state-space representation of the fractional model, which permits to approximate the continuous-time response of an ideal system.
然後，可以定義非整數階模型的狀態方程實現，它允許近似理想非整數階系統的連續時間響應。
