第一章是运输史的简要回顾。
The opening chapter gives a brief historical overview of transport.
去年交到俄勒冈州波特兰国际机场失物招领处的失物有15936件，其中大多数来自运输安全署检查站，机场发言人史蒂文·约翰逊说。
Most of the 15, 936 items logged into the lost-and-found office at Oregon's Portland International airport last year also were left at TSA checkpoints, says airport spokesman Steve Johnson.
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