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！

youdao

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！

youdao