| 1. | Pressure inequalities generate gas motion .
压强的不相等导致气体运动。 |
| 2. | Low base pressure is also a requirement to keep the surface clean .
低的基本压强也是保持表面清洁所要求的。 |
| 3. | For the pressure to become zero, molecular bombardment must cease .
当压强趋近于零时，分子的碰撞就停止了。 |
| 4. | It is a device used to measure the pressure of a fixed volume of gas .
这是一种用来测量气体压强（在体积恒定下）的装置。 |
| 5. | It is this fact that makes pressure so useful a quantity in physics .
就是因为这个性质，使压强成为一个非常有用的物理量。 |
| 6. | A glass envelope is used to contain a gas at about 1/1000 atmospheric pressure .
玻璃外壳中的气体压强约为11000大气压。 |
| 7. | The pressure is caused by the bombardment of the container walls by these particles .
气体的压强是由这些粒子对容器壁的撞击造成的。 |
| 8. | When the external pressure is below atmospheric pressure, the boiling point will be lower .
当外界压强低于一个大气压时，水的沸点就降低。 |
| 9. | For extrudates there are side crushing strength tests, bulk crushing strength tests, abrasion tests .
对挤条产品有侧压强度的测试，堆积强度测试和耐磨测试。 |
| 10. | Different parts of a solid can be under very different pressures, since the solid can not flow .
因为固体不能流动，所以它的不同部分可以具有完全不同的压强。 |
