secular perturbations的用法和樣例：
例句
- Planetary perturbations make the earth's orbit about the sun irregular.
行星的攝動使得地球繞太陽的軌道是不規則的。 - The concept of the non-fragile robust performance is presented for the design of the common control system with the perturbations of the controlled members and the controllers.
摘要為了解決在被控對象和控制器同時攝動時控制系統的設計問題，提出了一般控制系統的強魯棒性能概念。
