A train operation simulation system (MAS sim) is developed for the purpose of studying various issues concerning traffic organization under Moving Automatic Block condition.

针对移动自动闭塞系统的特点，研究开发了列车运行仿真系统(MAS - SIM)，用于移动自动闭塞条件下的行车组织若干问题的研究。

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Then my brother helped us to buy sim card, to buy clip card , and to get to know how the transportation works in Copenhagen. The metro, train, and the bus is very convenient.

弟弟带我们买了丹麦的电话卡，又熟悉了下丹麦便利的交通系统，地铁，火车，公交车.r去哪里都很快捷方便！

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Tep's first-of-its-kind multi-country service alleviates connectivity concerns for business travelers and tourists alike meaning you can now get on a train in London and travel all the way to Vienna without losing connectivity or swapping your sim along the way.

ENGADGET: Tep Wireless unveils European-wide hotspot rental service for $5-a-day, 1GB of data included