So, one possibility would be that your fluid is actually being compressed or expanded.
一种可能性就是，流体被压缩或是膨胀了。
2
Two small pouches, placed in the bottom of a shoe, are filled with the fluid and generate a current whenever they are compressed by the foot’s up and down motion.
当他们将两个装有该流体的小袋子置于鞋内时，它们就会因人脚抬升和下落的动作而受到挤压，从而产生电流。
3
Fluid dampers lessen the shock to a vehicle through the use of compressed fluids, while mechanical dampers mimics the fluid design, but USES electric signals instead of just a fluid substance.