They must have kept him under surveillance for a while." U.S.officials have been quoted as saying the operation Monday was launched when it became clear their target was traveling in an area away from heavy population.

VOA: standard.2009.09.15

Until we say something more, it's not clear that we shouldn't just, all right, note it, store it away, and forget about it, just like the facts about the state capitals.

直到我们说了更多之前，也不一定说，我们不应该，记下它，把它收起来，然后忘记它，正如关于州首府的事实一样。

耶鲁公开课 - 死亡课程节选