servlet规范中关于RequestDispatcher的一部分我看不懂

wwlhp@jdon.com 03-07-23

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。