PartⅢ Passage
BAS
BAS（Building Automation System）itself is an energy and comfort management system.It integrates the different systems in a building like HVAC，lighting，vertical transportation，fire safety and security in order to provide coordinated control of the building's functions.
BAS in a metro station can control the station temperature to maximize energy savings，providing optimum comfort and safety for passengers.
BAS joins mechanical and electrical systems and equipment with microprocessors，communicating with each other.In a fire emergency，a BAS can respond quickly to control the ventilation system to minimize the spread of smoke.It also coordinates all of the functions in a metro，such as shuting down elevators in the affected area，activating fire suppression system in the fire location，and opening security and emergency doors for passengers and emergency personnel.
BAS should offer the ability to send alarms via email and telephone to alert station masters or engineers of system problems and failures.
New Words and Expressions
BAS
BAS本身是一个能源和舒适性管理系统。它集成了一个建筑内不同的系统，如暖通空调、建筑照明、升降电梯、消防安全、安保等，目的是协调控制建筑内的所有功能。
地铁站的BAS可以控制车站温度并最大化地节约能源，为乘客提供最佳的舒适性和安全性。
BAS配备微处理器连接机械和电气系统并与之相互沟通。在发生火灾时，BAS可以快速响应控制通风系统，以降低烟雾的蔓延。它还可以与地铁中所有功能相配合，如关闭受影响区域内的电梯，启动在火灾中位置的灭火系统，以及向乘客和紧急救援人员打开安保门和紧急通道。
BAS可以提供通过电子邮件、电话向站长或工程师发送警报以提醒系统问题和失效的性能。