大厦内所有疏散人员听到火警警铃后应立即停止工作，保管好重要文件资料。

All the people to be evacuated from the tower must stop work and well keep important documents immediately after hearing the fire alarm.

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很多时候，当火警铃响起，城市里的其他市民就冲出去帮忙灭火。

Often, when the fire bell rang, other men in the city rushed to help put out the fire.

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火警铃的铛铛声惊动了全村的人。

The clang of the firebell alarmed the village.

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