If fire happens, you should leave and dial 911 for the fire department.
如果发生火灾，你应该马上离开，并拨打911呼叫消防队。
React immediately once fire happens.
一旦发生火情立即反应。
Fire Emergency lighting is crucial in evacuating when a fire happens.
消防应急照明是人员在突发事故情况下安全疏散的重要保证。
Different air distribution in gymnasiums has different influence on smoke movement when fire happens.
体育馆内气流组织形式不同，对火灾中火源产生的烟气运动影响也不同。
When an earthquake happens, almost there is no water, so you must avoid the fire.
地震发生时，几乎没有水，所以你必须避免的火。
When an earthquake happens, almost there is no water, so you must avoid the fire.
地震发生时，几乎没有水，所以你必须避免的火。
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