circular drainage system的用法和樣例：
例句
- The microwave ferrite circulator is an important non-reciprocal component for radar and microwave system.
微波鐵氧體環行器是雷達和微波系統中一個重要的非互易部件。 - Because data is stored in a spiral fashion, users should avoid wiping the disc in a circular motion.
因為數據是以螺旋方式儲存的，用戶應避免以環行的運動方式來擦拭光碟。
