But was there one major wave of migration across the Bering Strait into the Americas, or several?
但是有没有一次或几次大移民浪潮是穿过白令海峡到达美洲的呢？
In the same sea state, the time process and the space distribution along major wave direction of the sea surface wave are apparently different.
同一海况下，海面波动的时间过程和沿主波向的空间分布是明显不同的。
In the same sea state, the time process and the space distribution along major wave direction of the sea surface wave are apparently different.
同一海况下，海面波动的时间过程和沿主波向的空间分布是明显不同的。
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