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。
At the far end of the entry hall, a service corridor with laundry facilities leads to the other three bedrooms and two full bathrooms.
门厅的尽头是一条带有洗衣设施的服务通道，这里可通往另外三间卧室和两间全功能的浴室。
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。
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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