shawnfu

左图中杂乱的短线条将大脑判断空间方位的细胞弄糊涂了，致使我们将这些线条误解为是不平行的。要想消除此错觉，只要将图倾斜，从左下角沿对角线方向向上看，就会发现这些线事实上是平行的。
http://jifanghua.blogbus.com/logs/2004/02/84111.html


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