dead area的用法和样例：
例句
- Comparing with double dams, the tundish fixed with baffles has a similar minimum residence time, but a less dead volume.
导流挡板与双挡墙比较，最短停留时间变化不大，但死区体积更小。 - The CT findings of this tumor revealed a hypodense mass with occasional calcification, a central necrotic area, and a well-defined enhanced wall.
电脑断层检查肿瘤是呈现低密度，中间有坏死区，偶尔有钙化，及界限清楚且显影不错的壁。
