实质上活塞是一个在气缸中上下移动的圆筒状的塞子。

The piston is essentially a cylindrical plug that moves up and down in the engine cylinder.

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在汽车工业上活塞环镀锡和汽缸壁镀锡可防止滞死和拉伤。

In the automobile industry piston ring tin and cylinder walls tin can prevent sluggish death and injury.

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罩在隔膜内的空气将施加力量在隔膜上，使其进入套筒内部和活塞外部之间。

The trapped air in the diaphragm will force the diaphragm between the inside of the sleeve and the outside of the piston.

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So the force that you're pushing down on here is the external pressure times the area.

或者压缩功的概念,在活塞上施加压力。

麻省理工公开课 - 热力学与动力学课程节选

We have a weight on the piston, and that weight is chosen so that p2 it acts as though p external is equal to p2.

让活塞上放一重物，让它的效果刚好,等同于外压强。

麻省理工公开课 - 热力学与动力学课程节选

So it's going to shoot up until the internal pressure and the external pressure are in equilibrium.

活塞将上,移直到内外,压强达到平衡。

麻省理工公开课 - 热力学与动力学课程节选