From where comes this hole?
Below the four parts are moved around. The partitions are exactly the same, as those used above.
哪来的这个洞?
下面的四部分只是互换了位置,总的面积不变,那是怎么出来的这个洞?
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From where comes this hole?
Below the four parts are moved around. The partitions are exactly the same, as those used above.
哪来的这个洞?
下面的四部分只是互换了位置,总的面积不变,那是怎么出来的这个洞?