With the help of some users' multi -level relay, the center station can communicate with each user int he system.

通过用户站的多级接力，中心站可以和每一个用户站进行通信。系统硬件简单，占用频率资源少，成本低。

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How far is it from the subway station of Center Street to the cinema?

从中央大街的地铁站到电影院有多远？

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NOAA's National Weather Service center in Palmer,Alaska supervises a warning station for the United States mainland and Canada.

VOA: special.2009.03.17

Bob Dempsey, at the Johnson Space Center in Texas, is the lead International Space Station flight director for this mission.

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Attached to Tranquility is a robotic control station with six windows around its sides and another in the center.

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The pink, rectangular icon on the computer screen representing the progress of PATH train 5780 blinked, as the cars rolled out on the westbound tracks from the World Trade Center station.

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Robin Moulna, 38, a manager at a fast-food restaurant, was surprised to receive a call from his brother while waiting for an F train in the Rockefeller Center subway station, two levels underground.

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They marched on the Clark Center after a conservative radio station, Radio Mambi, broadcast interviews with two Cuban-American G.

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