Michael crawls through the hole and into a narrow, but extensive service corridor. Metal catwalks and pipes sprawl in all directions.

Michael爬过洞去，进入了一个狭窄的，但是空间广阔的维修通道，狭窄的通道和管道向各个方向蔓延展开。

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The Tier IIstandards only impact the Amtrak Acela Service on the Northeast Corridor because Acela is currently the only Tier II application operating in the United States.

Ⅱ级标准仅对东北走廊线的美铁阿西乐客运快线服务有效，因为阿西乐是美国目前唯一应用Ⅱ级标准运行的客运快线。

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The maintenance man in the service corridor stops to take a smoke break.

在维修走廊的维修工人其实是进来抽支烟的。

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Amtrak announced just after noon that it would halt all service on the northeast corridor between New York and Boston, at the request of police involved in the manhunt.

WSJ: Dragnet Quiets Normally Bustling Boston

Amtrak suspended service along its heavily traveled Northeast corridor, which ferries about 750, 000 daily riders on a typical workday.

WSJ: Travelers Face a Nightmare

From the Ground Floor Corridor rooms, transformed from their early use as service areas, to the State Floor rooms, where countless leaders and dignitaries have been entertained, the White House is both the home of the President of the United States his family and a museum of American history.

WHITEHOUSE: Inside the White House