There are bridges, Metro train from Airport to the Village, a lot of bridges.

建起了桥梁，从机场到运动员村的地铁，很多的桥梁。

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This paper analyzes the influencing factors for metro train routing and presents the calculation formula on minimum quantity of required train sets for any routing.

分析地铁列车交路设置的影响因素，给出任一交路下车底数下界的数学计算公式。

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Metro train is one of the most important components of urban rail transit, and scientific maintenance of metro train is the first priority to ensure the safe operation of URT.

科学地对城市轨道交通的车辆进行维护和保养是确保城市轨道交通安全运行的首要条件。

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He says the display was designed to look like a map of the local Washington Metro train system instead of a tree.

VOA: special.2009.12.01

Despite the Supreme Court's ruling, Klevets says she is not giving up on her dream to drive a metro train.

VOA: standard.2009.11.05

It includes nearly 500 positions, including chimney sweep, firefighter,blacksmith,steel worker, diver and metro train operator.

VOA: standard.2009.11.05

An investigation into a fire which saw passengers flee a Tyne and Wear Metro train is focussing on emergency exits.

BBC: Metro train fire

In New Delhi, the nation's capital, public transport was partially hit with taxis and some buses off the road, but the city's metro train service wasn't affected.

WSJ: Millions in India to Resume Work Friday After Strike

Acre 121, a small live music venue that opened in 2011, is named for the historical lot (acre 121) that first delineated Columbia Heights, and now means local residents can jam to bluegrass and funk on weekends without having to hop a Metro train downtown.

BBC: The new neighbourhoods of Washington DC