But with the tsunamis that head out to sea, some of the energy dissipates as the wave spreads outward across open ocean, like a ripple from a rock thrown into a pond.
但当海啸向海域进发，随着波浪向远洋扩散，能量也会逐渐消耗，这跟将一颗石块扔进池塘所引发的波纹是一样的道理。
A typical ocean wave forms when wind produces a ripple across the surface of the sea.
风掠过海面时产生水波就形成了典型的海浪。
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