But the main movement of humans into Europe came only 60,000 years ago.

但人类进入欧洲的主要迁徙只发生在6万年前。

" Eddy" (eddy) is a movement either in water or in the air in the opposite direction of the main movement, especially when it is moving in a circle.

“涡流”（eddy）是水中或空中与主要运动方向相反的运动，尤其是在做圆周运动时。