You may notice an air pressure change on an elevator ride that transports you many stories, but you need only dive a meter or so below the surface of a pool to feel a pressure increase. The difference is that water is much denser than air, about 775 times as dense.

这段话很显然的意思，就是气压的变化是高度引起的



【 在 laofu 的大作中提到: 】
: 气体不是流体啊，气体压强只和密度及温度有关
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