利用液体的可压缩性，通过机械方法，可以使微小的直线往复运动获得较大的压强。
Based on the compressibility of liquid, through the mechanical mean can translate the small linear displacement into higher pressure.
但由于气体的可压缩性明显大于液体，因而气体的状态方程与液体完全不同。
But due to the compressibility of gas significantly higher than fluid, the state equation of gas is different from fluid.
由于液体的不可压缩性(实用上可认为是真实的)，离心泵对液体施加的全部能量欲使液体运动。
Due to the incompressibility of liquids (true for practical purposes), all energy imparted to a liquid by the pumping action tends to put it in motion.
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