这允许用户登录，并假设用户在某个会话期间扮演一个或潜在的多个角色。
This allows the user to log in and assume one or potentially multiple roles during a session.
用户想要的是指向潜在相关信息的一系列链接。
What users get is a list of links that point to potentially related information.
如果服务的潜在用户对它的内容不满意，应该怎么办？
What happens if potential users of the service disagree on its content?
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