Let's do an example. Let's try to figure out if we have just a uniform disk how hard it is to spin it around its center.
还是看个例子吧，有一张均匀的唱盘，让它绕中心旋转有多难呢？
Let's do an example. Let's try to figure out if we have just a uniform disk how hard it is to spin it around its center.
还是看个例子吧，有一张均匀的唱盘，让它绕中心旋转有多难呢？
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