请教： Home Security System

来源: 于 2011-02-10 08:54:30 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

大家都会在家里装有

- ADT system, or

- Camera Surveillance System, or

- the both of above

Why?  Why not?

your input would be great appreciated.