紧急广播系统是社会公益。
于此同时，我们或许也能使用微软正在Beta测试的紧急广播系统Vine。
In the meantime, perhaps we can use Microsoft's beta emergency broadcast system Vine.
真是惭愧；twitter总是让人们觉得它可以弄出一个非常不错的紧急广播系统来。
It's a real shame; Twitter has always seemed like it would make a good emergency broadcast system.
过了不多久从P. A .系统中传出紧急广播：“该旅店是完全由防震材料建筑而成。”
Before long an emergency announcement came over the P.A. system: "This hotel is constructed to be absolutely earthquake-proof."
本系统消防广播部分为总线制，由广播切换模块实现背景音乐与紧急广播切换。
This system fire prevention broadcast part is the main line system, realizes the background music and the urgent broadcast by the broadcast cut module cuts.
本系统消防广播部分为总线制，由广播切换模块实现背景音乐与紧急广播切换。
This system fire prevention broadcast part is the main line system, realizes the background music and the urgent broadcast by the broadcast cut module cuts.
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