但一位睿智的博主曾经说过争论就要争论主要的观点，而不要去计较边边角角的问题。

But a wise blogger once said that it's a good principle to argue about other people's main points, not to quibble over side issues.

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晶体学家阿伦·麦凯利用圆圈代表彭罗斯瓷砖砖角处的原子，建造了一个模型，然后计较了将会产生如何的一种衍射图案。

Crystallographer Alan Mackay built a model with circles representing atoms at the corners of Penroses tiles and calculated what sort of diffraction pattern it would produce.

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