time-varying systems的用法和樣例：
例句
- The problem of robust output tracking control for a class of affine nonlinear time-varying systems with mismatched uncertainties is considered.
研究一類具有非匹配不確定性的非線性時變系統的魯棒狀態反饋輸出跟蹤控制器設計問題。 - The accurate mathematical model of WIM is difficult to establish because WIM's parameters change with time when they work.
摘要動態稱重系統在測量的過程中為一時變系統，難以對稱重系統建立精確的數學模型。
