汽车、火车、舰船鸣笛，防空警报鸣响。
防空警报响起时，大家都快速进了防空洞。
Everybody quickly went to the bomb shelter when the alert sounded.
国家用于人民防空通信的专用频率和防空警报音响信号，任何组织或者个人不得占用、混同。
No organizations or individuals may use the same frequency or the same acoustic signals as those specially used by the State for civil air defense communications or air defense warning.
防空警报声响起，汽车、火车和舰船笛声哀鸣，人们肃立着为上周地震中的遇难者默哀3分钟。
Air raid sirens, and car, train and ship horns wailed and people stood for three minutes in silence yesterday to mourn the tens of thousands who died in last week's earthquake.
利用无线自组织网的相关技术对传统防空警报网络进行组网，可以克服传统警报网络覆盖性差、抗毁能力差等缺点。
With related technology of wireless AD hoc network to organize the traditional air defense warning network, such shortcomings as the poor network coverage and the poor survivability can be overcome.
今天，中国星期一下午当地时间2点28分，当防空警报、汽车、火车和轮船的喇叭汽笛齐声鸣叫呜咽时，三分钟静默开始。
Today, a three minute silence began at 2:28pm local time in China, as air raid sirens and horns of cars, trains and ships wailed in grief.
防空警报鸣响，彷佛发出阵阵哀号，每个司机都按响了汽车喇叭，空气中的喧嚣与此时身边画面的一片静止形成了鲜明对比。
With sirens wailing and every driver leaning on his or her horn, the air was filled with a riot of sound that contrasted with the absolute stillness of movement.
这次活动在学校的鉴主广场举行，为了表达我们对灾区人民的哀思，我们站成心型，在2点28分整，汽车鸣声，防空警报顿时全城响起。
As a token of our sadness for the sufferings bore by the disaster zone people, we stood in the shape of a heart. At 2:28pm, air siren and car horns filled the city.
这次活动在学校的鉴主广场举行，为了表达我们对灾区人民的哀思，我们站成心型，在2点28分整，汽车鸣声，防空警报顿时全城响起。
As a token of our sadness for the sufferings bore by the disaster zone people, we stood in the shape of a heart. At 2:28pm, air siren and car horns filled the city.
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