PartⅡ Sample Dialogue
A：Peter，what did we talk about last class?
B：It's BAS.
A：What is the full name of BAS?
B：It's Building Automation System.
A：Can you tell me its basic components?
B：It has four basic parts，big system，small system，water system and tunnel ventilation system.
A：What is the difference between big system and small system?
B：A ventilation and air conditioning system in a public station area is called big system，and the system in a station equipment house is called small system.
A：How does BAS work?
B：There are many sensors connected to each system.The sensors measure their surrounding environment from different locations，then collect physical data and send them to the BAS computer.BAS computer will calculate and analyze the data to control the whole system.
A：That is correct.Good job，Peter.Next time we are going to talk about FAS.
对话
A：彼得，上节课我们谈了些什么？
B：是BAS。
A：BAS的全名是什么？
B：这是楼宇自动化系统。
A：你能告诉我它的基本组成部分吗？
B：它有四个基本部分：大系统、小系统、水系统和隧道通风系统。
A：大系统和小系统有什么区别？
B：公共站区的通风空调系统称为大系统，车站设备房的通风空调系统称为小系统。
A：BAS如何工作？
B：每个系统连接的传感器很多，传感器从不同的位置测量周围的环境，然后采集物理数据并发送到BAS计算机，BAS计算机对数据进行计算和分析，以控制整个系统。
A：完全正确。很好，彼得。下次我们要讨论FAS。