servlet规范中关于RequestDispatcher的一部分我看不懂

03-07-23 wwlhp@jdon.com

在request.getRequestDispatcher(path)的参数中也可以带有查询子串。

但规范中这段话我就不明白了,

Parameters specified in the query string used to create the RequestDispatcher take precedence over other parameters of the same name passed to the included servlet. The parameters associated with a RequestDispatcher are scoped to apply only for the duration of the include or forward call.

谁能给我解释一下。