当我们听到“同辈压力”这个词时，我们大多数人的脑海中总会半诱惑半强迫地出现这样一个低低的声音。
That whispered message, half invitation and halt forcing, is what most of us think of when we hear the words peer pressure.
冲击波只是压力波的一种特定形式- 它是声音自身所包含的。
Shock waves are just a particular kind of pressure wave - which is what sound itself comprises.
虎鲸，人类以及其它生物感知的声音是由压力中微小的振动组成的。
What orcas, humans and other creatures perceive as sound consists of small fluctuations in pressure.
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