You can't know in advance that something like the Halloween memorandum is going to land on you.
您并不能预先知道象万圣节备忘录这样的东西会落在您身上。
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Merlin's research into recently declassified documents on the OXCART project unearthed a memorandum that reported that all traces of the plane had been removed from the crash scene in 1963.
The White House announced the rule changes, which will also make it easier for gay men and lesbians to make medical decisions on behalf of their partners, in a memorandum released Thursday night.