audible annunciator electronic a unciator electronic annunciator
Example Sentences:
1.
But new safety devices such as electronic beacons and gps locators have made it easier to find skiers buried in avalanches 但是新的安全装置，例如电子信号器以及全球卫星定位系统，已经让被雪崩埋住的滑雪者更容易被找到。
