例如，普通的Clojure函数都有较低的调用开销，因为它们都尽量降为静态函数调用。

For instance, normal Clojure functions have low call overhead as they're mostly reduced to static method calls.

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包装之后，就可以按照对其他任何静态函数调用方法的相同方式来对该函数调用方法。

Once wrapped, you can call methods on the function as you call methods on any other static function.

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然后调用xml2json类中的静态函数得到json格式的结果。

Then it calls a static function in the xml2json class to get the JSON-formatted result.

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