Then next week we'll do more complicated problems that involve motion in higher dimensions, how to go to two dimensions or three dimensions.
下周我们将会处理更复杂的问题,包括更高维数的物体运动,如何处理二维以及三维运动
The next difficult thing is to consider motion in higher dimensions.
更难的就是,要考虑更高维的运动
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