broke out的意思是：突发。
broke out详细释义：（战争等）突发；（囚犯等）逃脱；起（锚）。
双语例句
1、The little girl broke out in rashes on her back,so she couldn't go to the kindergarten.
小女孩背上起了疹子，所以她不能去幼儿园了。
2、A fire broke out during the night.
夜里起了一场火灾。
3、Fighting broke out in three districts of the city last night.
昨夜这座城市有三个区发生了战斗。
4、Where were you living when war broke out?
战争爆发时你住在哪儿？
5、We can fix the ship's exact position at the time the fire broke out.
我们可以确定发生火灾时那艘船的确切位置。
broke out具体用法：
1、战争爆发：The war broke out in 1939.
2、火灾发生：A fire broke out in the building, causing extensive damage.
3、暴乱爆发：Violent protests broke out in the city after the controversial ruling.
4、传染病扩散：A pandemic broke out and quickly spread around the world.
5、骚乱爆发：Riots broke out in the city center, leading to widespread destruction and chaos.
总之，"broke out" 用于描述突然爆发的事情，通常指危急的状况和不可预测的事件。