There are two aspects of it. Thus far, the problem sets have mostly focused on function.

关于这个问题有两个方面，迄今，问题集只关注了方法。

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The Greeks, as far as I know, did not allow anybody to be left handed in a phalanx; think about the problem.

希腊人,据我所知,在方阵里中不允许有左撇子,思考下这个问题

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So one problem is unenforceability but that might far off ago that might have been a problem.

强制性是一个问题,但那也是在很久以前的问题

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