在海滩上，当地震发生时，要逃离大海，迅速移动到高地。
On a beach, run away from the sea and move quickly to higher ground when an earthquake happens.
树林中的风，海滩上的波浪，瀑布的水流，头顶飞鸟，移动的云层。
Examples - wind in trees, waves on a beach, water flowing over a waterfall, birds flying over head, moving clouds.
作为一种力学比拟，我们可以想象海滩上被水波移动的卵石。
As a mechanical analogy, We can think of pebbles dislodged from a beach by water waves.
作为一种力学比拟，我们可以想象海滩上被水波移动的卵石。
As a mechanical analogy, We can think of pebbles dislodged from a beach by water waves.
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