| Agnieszka 的个人资料Top Gun照片日志列表 |  工具  帮助 |
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5月16日 Dictum"So the message is, that there are known knowns; there are things we know that we know. There are known unknowns; that is to say there are things that we now know we don't know. But there are also unknown unknowns - there are things we do not know we don't know. And each year we discover a few more of those unknown unknowns."
Donald Rumsfeld, 2002
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