我们不可能确定是两个大陆在向相反的方向移动，还是一个大陆是静止的，而另一个大陆在漂移。
It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it.
1912年，阿尔弗雷德·魏格纳在一个被称为“大陆漂移”的理论中提出，地球上的大陆是可移动的。
In 1912, Alfred Wegener proposed, in a widely debated theory that came to be called continental drift, that Earth's continents were mobile.
当目光移动时，模式中的白色和黑色边缘在视网膜上漂移，刺激了大脑皮层敏感的视神经元。
When your eyes move, they shift the retinal images of the white/black edges in the pattern, activating the motion-sensitive neurons in your visual cortex.
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