内链与外链在搜索引擎优化中占有非常重要的作用。

The chain and the chain plays a very important role in the search engine optimization.

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即使有时越过了“内”与“外”的界限。

Even it sometimes cross the line of "home" and "outside".

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由此足见，第一，外与内首先是同一个内容。

In the first place then, Exterior is the same content as Interior.

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由此足见，第一，外与内首先是同一个内容。

In the first place then, Exterior is the same content as Interior.

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