随着时间的推移，他们会发现其他的功能(像小组，导入Feed，以及保存的检索等等)，但是这些东西不会出现在最初的用户体验中。
Over time, they are able to discover other features (such as groups, saved searches, imported feed, etc), but those things aren't part of the initial experience.
人们把考试视作给学生进步打分的工具，然而研究发现，从记忆中检索信息这一行为可使人们记东西更加容易。
Although many people view tests as a way to mark and grade students' progress, research has found that the act of retrieving information from memory actually makes remembering it easier.
不过，所有动态web站点都具有两个关键的共同点：数据库以及从该数据库(动态地)检索到的东西。
However, all dynamic Web sites have two critical things in common: a database and something retrieved (dynamically) from that database.
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