Definition: a set of connected pieces of equipment that operate together Level: B1
他们家有一套防盗警报系统保护。
Their home is protected by a ___system of burglar alarms.
整栋房子都由中央供暖系统供暖。
The whole house is warmed by a central-heating ___system.
音乐厅的新音响系统能产生清澈透亮的音效。
The concert hall's new sound ___system produces crystal-clear audio.
