"三关"是个多义词，它可以指三关（八卦术语）,三关（中医名词）,三关（古代地名）,三关（佛教禅宗名词）,三关（网络流行词）。
如果你能闯过三关，你算得上是个天才。
现在请同学们再阅读文章，这次，读完文章后，你要试着去读过三关。
Now please read the passage again. This time, you should pass three levels after reading.
明朝在“外边”长城之外，还修筑了“内边”长城和“内三关”长城。
Ming Dynasty in "outside" outside Great Wall, but also has constructed "in side" the Great Wall and "in three passes" the Great Wall.
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