air-raid siren

The air is filled with angry shouts, the intermittent siren.

空气中充满着人们愤怒的吼声, 断断续续的警报声.

A reporter Guo: yesterday 11:32, Guangzhou over the air-raid siren sounded.

本报讯记者郭尧报道: 昨天上午11时32分, 广州上空拉响了防空警报.

The Design and Implementation of Air-Raid Siren Control System

人民防空警报控制系统设计与实现

We all heard the air-raid siren.

我们都听到了空袭警报器的声音.

Air-raid Siren Wired Control and Remote Condition Monitoring System

防空警报有线控制及远程状态监测系统

In the parking lot of the school, the siren filled the air

警报声响彻学校停车场。

Every time the air raid siren sounded, people rushed to the nearest air raid bomb shelter.

每次空袭警报响起的时候, 人们就冲向最近的空袭防空洞.

This paper introduces a design of air-raid siren controller which based on 8751 CPU. A detailed and systematic introduction is given both on hardware and software. Some techniques on hardware and software are presented which related on realizing a fail-safe system of high reliability.

对基于8751的防空报警控制器的设计方案，从硬件、软件两个方面作了详细、系统的阐述，并介绍了实现具有高可靠性、故障安全系统的硬件、软件方面的一些技术。

The air-raid siren screamed through the whole town.

空袭警报在整个城镇中尖叫.

an air-raid siren

空袭警报器

The very sound of an air-raid siren is enough to give my mother the horrors.

那空袭特有的声音就绝对就足够给我母亲这种种的恐惧.

An order was issued to black out at the sound of the air-raid siren.

已下令听到警报声就实行灯火管制.