这类表单仍然很常见，尽管它通常不是孤立在单独的网页上。

This sort of form is still quite common, although it's usually not isolated on its own Web page.

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这样，你可以很容易地孤立那些谁下载的项目，他们是唯一谁永远不会打这些网页。

That way, you can easily isolate those who downloaded items; they are the only ones who will ever hit those pages.

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