fluid compressibility

例句：

1. 1. The fluidity of the material is crucial for its function.
   该材料的流动性对其功能至关重要。
2. 2. The physicist used a fluid to cool down the engine.
   物理学家使用一种流体来冷却发动机。
3. 3. The oil in the engine was a fluid that could be pumped and distributed.
   发动机中的油是一种可以泵送和分配的流体。