A request parameter is used to filter out the necessary content items.

可以使用一个请求参数来过滤出必要的内容项。

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As clients make requests for Web pages, a farm of servers can serve up the necessary content.

当客户机发出对web页面的请求时，服务器农场(farm of server)可以提供所需的内容。

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Now, an HTML view can simply use this bean to render the necessary content, as shown in Figure 22.

现在，html视图只需使用这个bean即可处理所需的内容，如图22所示。

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But all of this begs the question: Is the splashy TV-style content necessary, or even desirable, on the Web, a medium that is able to lure millions of eyeballs with stuff made by amateurs?

FORBES: AOL's Prime-Time Strategy

So far others haven't been able to obtain the necessary keys to decrypt high definition content, and now Cyberlink, makers of the PowerDVD software many assumed was exploited for the attack, is denying vulnerability.

ENGADGET: blogger-avatar

But although the new architectures may lower the cost of smart handheld devices, new types of Web content will likely be necessary before users will want to surf the Web while walking down the street, Turley commented.

CNN: New chip design targets cell phones