buzzer

1.a loud buzzer sounded.

蜂器大声地响起来。

2.I heard the buzzer go four times.

我听到蜂器响四次。

3.the buzzer interrupted his thoughts.

蜂器打断他的沉思。

4.Press the buzzer when you want to talk.

你想讲话的时候就蜂器。

5.The buzzer went off at eight o’clock.

蜂器在8点钟时响。

6.We pressed the buzzer in our cabin and a steward arrived instantly.

我们舱的呼叫器, 一个乘务员马上来。

7.Buzzer will start working if there exists barriers less than 1.5m distance with back of car, the hurrier of voice, the closer of distance, the distance could be displayed on real time as well.

轰声越急，表示车辆离障碍物越近,而且可以实时显示车后障碍物离车体的距离。