Ray LaHood, Secretary of the U.S.Department of Transportation, says distracted driving is a critical problem.

VOA: standard.2010.06.24

Well it kind of depends on what you think is driving the problem, and each of these things suggest a different level, different types of things you might do.

这取决于你对产生这个问题的原因的理解,不同的理解决定着你可以采取的,行动的层次和方式

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