That key might be provided free for trial or personal use, and it can be associated with layered subscription pricing models for commercial use or to access advanced content and functionality.

此密钥可以免费试用或供个人使用，也可以将其与分层订阅定价模型关联来供商业使用或访问高级内容和功能。

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Search for magazine content. Select Magazines in the Advanced Book Search to locate information from magazines.

搜索杂志目录。在高级图书搜索中选择杂志，查找杂志中的信息。

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HTML V4 was designed to end this chaos, as it externalized presentation logic to CSS and introduced layers (DIVs) for advanced positioning of content.

HTML V4的出现就是为了结束这种混乱，它将表示逻辑推给了CSS，为高级的内容定位引入了层(DIV)。

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To supplement the advanced content, Opta is also using social media to get fans more involved.

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McCormick argues that culling information from the text surrounding YouTube videos including comments from users has generally been enough to allow advanced content targeting.

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For now, advanced content optimization which takes a big-picture approach to accelerating an entire site is still the only reliable way to radically optimize sites without causing harm.

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