dead area的用法和樣例：
例句
- Comparing with double dams, the tundish fixed with baffles has a similar minimum residence time, but a less dead volume.
導流擋板與雙擋牆比較，最短停留時間變化不大，但死區體積更小。 - The CT findings of this tumor revealed a hypodense mass with occasional calcification, a central necrotic area, and a well-defined enhanced wall.
電腦斷層檢查腫瘤是呈現低密度，中間有壞死區，偶爾有鈣化，及界限清楚且顯影不錯的壁。
