1、Often, when the fire bell rang, other men in the city rushed to help put out the fire.
很多時候，當火警鈴響起，城市里的其他市民就沖出去幫忙滅火。

2、The children were drilled to leave the classroom quickly when the fire bell rang.
孩子們接受了如何在火警拉響時迅速離開教室的訓練。

3、They earned their money at other jobs, but dropped what they were doing when the fire bell rang.
他們通過別的工作爭搶，只是在火災報警響起的時候發(fā)下手頭的工作去救火。