fire size class

例句：

1. 1. The firesize class is determined by theintensity of the fire and the distanceit has traveled.
   火灾大小分类是根据火的强度和它已经传播的距离来确定的。
2. 2. Fire size class is a critical factorin determining the safety measures to be takenduring a fire.
   火灾大小分类是决定在发生火灾时采取的安全措施的关键因素。
3. 3. In this case, the fire sizeclass was determined to be high, requiringimmediate action.
   在这种情况下，火灾大小分类被确定为高级别，需要立即采取行动。