PartⅡ Sample Dialogue
A：What is it on your table?
B：It is a booklet about ATO，Automatic Train Operation.
A：Do you finish reading it?
B：Yes，I have finished it last night.
A：Great!I've heard a lot about ATO，but I have no clue what it is.Can you tell me a little if you are not busy?
B：OK.ATO means Automatic Train Operation.It has a program operating a train instead of the traditional way.
A：What is the traditional way?
B：The traditional way is that dispatchers control train's movement manually from a dispatch center.After ATO in place，run and stop will be controlled automatically by ATO.What a dispatcher needs to do is to monitor whether ATO works normally.So comparing with the traditional way，the greatest advantage of ATO is that the system can reduce human error.
A：That means ATO can help to reduce the possibility of an accident.
B：That is right.It is the purpose of ATO.Recently，more and more metro lines bring in ATO to their operation considering safety，efficiency and economy.
对话
A：你桌上是什么？
B：这是一本关于自动列车运行的小册子。
A：你读完了吗？
B：是的，我昨晚已经读完了。
A：太棒了！我听说过很多关于ATO的事，但我不知道它是什么。如果你不忙，你能告诉我一点关于ATO的事吗？
B：好的。ATO是指列车自动运行，它有一个程序来运行列车，而不是传统的方式。
A：传统的方式是什么？
B：传统的方式是调度员从调度中心人工控制列车的运行。在ATO就位后，运行和停车由ATO自动控制。调度员需要做的是监控ATO是否正常工作。因此，与传统的方式相比，ATO的最大优点是系统可以减少人为误差。
A：这意味着ATO可以帮助减少发生事故的可能性。
B：是的，这是ATO的宗旨。近年来，考虑到安全、高效和经济，越来越多的地铁线路引入ATO运营。