seismic alarm system

• 地震预警系统

seismic alarm system的用法和样例：

例句

1. One third of Tokyoites polled some years ago said they did not even know an earthquake-warning system existed, and the government is loth to test it for fear of causing alarm.
   几年前，三分之一的东京人投票说他们甚至不知道还有一个地震预警系统，政府则不愿意测试，以防导致恐慌。