动力分析表明这是由潮扩散的不对称性造成的，即落潮期间垂向湍流扩散比涨潮期间弱。
This is caused by the tidal diffusion asymmetry in which the vertical turbulence diffusion in the ebb tides is weaker than the one in the flood tides.
涨潮期间乌鸦被迫靠近附近一个有许多食肉动物的森林，这时任何乌鸦也不干警戒战斗的事。
And during high tide, when the crows were forced closer to a nearby forest where predators abound, no crows were manning battle stations.
地球自转24小时期间，我们就会经历两次的涨潮。
And we pass both high tides during each twenty-four-hour rotation of the earth on its axis.
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