为了最大化你的曝光量，考虑不同类型的用户，然后为他们提供不同层面的用户互动以把他们拉回你的网站。
To maximize your exposure, consider different types of users and offer them multiple levels of user interaction which would bring them back to your site.
少数内部使用的类型曝光给了用户。
A few types used internally by the interpreter are exposed to the user.
使用曝光的救济/凹版印刷类型的方法。
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