名词
中文翻译：振铃信号发生器
同义词：
['ringing signal generator', 'ringing signal generator']
例句：
-
1.The ringing signal generator was used toalert the fire department.
振铃信号发生器被用来通知消防部门。
-
2. The ringing signal generator was used to test thenew phone system.
振铃信号发生器被用来测试新的电话系统。
-
3. The ringing signal generator was used to provide emergencywarnings during a power outage.
在停电期间，振铃信号发生器被用来提供紧急警告。