pressure radius

例句：

1. 1.The pressure radius of the gas is directly proportional to its volume.
   气体的压力半径与其体积成正比。
2. 2.The pressure radius of the liquid is inversely proportional to its density.
   液体的压力半径与其密度成反比。
3. 3.The pressure radius of the solid is constant regardless of its shape or size.
   固体的压力半径与其形状或尺寸无关，始终保持不变。