A remarkable fact discovered relatively recently (Laczkovich 1990) is that we can dissect the disk into a large but finite number of pieces and then reassemble the pieces into a square of equal area.
最近（Laczkovich 1990）发现的一个惊人的事实是我们可以将圆分为很大但有限块然后重拼成一个相同面积的正方形。