这些真理的追求者们关心的是观察、事件背后的原因。他们对复杂问题“刨根问底”，而且具有详尽调查的能力。
These truth-seekers are concerned with the underlying causes of observations and events. They dive to the root of complex problems and have an exhaustive capacity for inquiry.
此刻不是探究整个事件背后原因的时候。
但是诸如胡德堡军事基地枪击案之类的事件暗示发生更多类似事件的可能性，其背后的原因和动机也会引致更多事件的发生。
But episodes like the shooting at Fort Hood suggest the possibility of more, and the sort of reasons and motivations that could make for more.
不错，确实如此。但是我们真的知道上世纪30年代大萧条背后的本质原因吗？更重要的是，我们真的已经积累了足够多的经验去避免这一事件再次发生吗？
Yes, we have. But have we learned what caused the Depression of the 1930s? Most important, have we learned enough to avoid doing the same thing again?
事故调查机构负责人保罗·路易·阿尔斯·拉尼安星期三在巴黎说，这次跨国调查行动也许永远无法解开447号航班坠毁事件背后的所有原因。
Speaking Wednesday in Paris, chief accident investigator Paul Louis Arslanian says the international probe may not reveal all of the factors behind the crash of Flight 447.
事故调查机构负责人保罗·路易·阿尔斯·拉尼安星期三在巴黎说，这次跨国调查行动也许永远无法解开447号航班坠毁事件背后的所有原因。
Speaking Wednesday in Paris, chief accident investigator Paul Louis Arslanian says the international probe may not reveal all of the factors behind the crash of Flight 447.
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