design variable的用法和樣例：
例句
- Several practical considerations such as the discreteness of design variables are included in the optimization procedure.
對一些實際情況如設計變數的離散性問題作了合理的考慮。 - The thickness of laminated plates is considered as the object function and the winding angle as the design variable.
以層合板的各層鋪設角為設計變數，層合板的厚度為目標函數進行優化設計。
