page 作用域指出这项设置只适用于当前页，而 request 作用域将它应用于请求期间访问的所有 JSP 页面。
The page scope indicates that the setting is only applicable over the current page, while the request scope applies it to all JSP pages accessed during a request.
这种应用方法同样适用于DVB-C 以及DVB-T 等其他嵌入式系统，对其他嵌入式系统中数据存储的开发有一定指导作用。
The method is also applicable in other systems such as DVB-C STB and DVB-T STB, etc, and is significative for developments in those systems mentioned above.
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