shawnfu

只有量一下你才会相信：上图中两条粗黑线段事实上是一样长的。原来是透视图欺骗了大脑，使它感觉近处的线段较短。有时候即使我们知道了这一点，仍会感到困惑不解。
http://jifanghua.blogbus.com/logs/2004/02/84111.html


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