My first two years as a guard I was working at the controlcenter as an operator where the entire emergency calls and electronic alarms are received.
当警卫的头两年我在控制中心做接线员，所有的紧急呼叫和电子警报都会接到那。
2
In the event of an emergency, passengers riding on the subway trains are able to contact the controlcenter through the wireless intercom devices installed on every carriage.
在紧急情况下，乘坐地铁列车的乘客可以通过安装在每节车厢里的无线对讲设备与控制中心联系。
3
This paper presents an emergency call center system. The kernel software of the system is designed based on a finite-state machine, featuring with clear control structure effective program code.