The change in air pressure associated with a sonic boom is only a few pounds per square foot — about the same pressure change experienced riding an elevator down two or three floors.

和音爆有关的气压变化只有每平方英尺几磅——大约是坐电梯向下两到三层所感受到的气压变化。

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That's because under high-pressure systems, cold air slides down mountain slopes and pools down below.

那是因为在高压系统下，冷空气沿山坡下降，并于地势低处聚集。

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The experiments included hanging people upside down until they choked, burying them alive, injecting air into their veins and placing them in high-pressure Chambers.

实验内容包括：将人吊起来直至窒息，将人活埋，将空气注入血管中和将人放入高压的室内。

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Because it's so hard in water and to maintain voice features, one of the other aspects of this is that when you dive down the pressure increases, the water pressure increases and actually changes these air filled cavities and you have that influence voice characteristics quite a lot.

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