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U.S. Department of Transportation Secretary Mary E. Peters Announces A Substantial Life-Saving Technology
crash prevention
2007/4/11
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Daylight Saving Time gotchas may get you(图)
Daylight Saving Time energy consumption calendar
2007/3/12
US experiment extending Daylight Saving Time unlikely energy saver, researchers say
Daylight Saving Time energy consumption
2007/3/12
Daylight Saving Time to Begin March 11,Expand by Four Weeks in 2007
Daylight Saving Time railroad
2007/3/9