Break out用法一：If something dangerous or unpleasant breaks out, it suddenly starts.如果发生了危险或不愉快的事情，它突然开始。

例句：War broke out in 1914.1914年爆发了战争。

Break out用法二：If an infectious disease breaks out, people start to suffer from it and it spreads to others.如果传染病爆发，人们开始遭受其苦，并且它传播给其他人。

例句：Many diseases have broken out in these camps.这些营地爆发了许多疾病。

例句：Cholera broke out in the city.霍乱在城市爆发。

Break out用法三：可与rash、spots、a sweat搭配表示：to suddenly have something such as red marks or sweat appear on your skin.皮肤上突然出现红斑或汗水等。

break out in a rash出疹子

例句： I broke out in a rash all over my body.我全身都出疹子了。

例句：She broke out in a rash after eating some strawberries.她吃了一些草莓后出疹子了。

例句：The drugs they prescribed caused my vision to blur and my skin to break out in spots.他们开的药让我视力模糊，皮肤出现斑点。

例句：I have a tendency to break out in acne when I'm stressed.我压力大时容易长痘。

break out in a sweat出汗

例句： It didn't take much exercise to make him break out in a sweat.他稍作运动就出汗了。

例句：When I heard the noise I broke out in a cold sweat.我听到噪音时，我出了一身冷汗。

例句：My whole body had broken out in a sweat and my heart was pounding.我全身都出汗了，心也在怦怦跳。

Break out用法四：to escape from prison逃离监狱

例句：They broke out of prison and fled the country.他们越狱并逃离了国家。

Break out用法五：to escape from a place or a situation逃离一个地方或一种情况：

例句：Two inmates broke out of prison and are still at large.两名囚犯越狱，仍在逃。

Break out用法六：to suddenly begin to have a rash (= spots on the skin)皮肤上突然开始出现疹子（=皮肤上的斑点）

例句：Detergents make my hands break out.洗涤剂让我的皮肤出疹子。

例句：I hate it when I break out in hives.我讨厌自己出荨麻疹。

Break out用法七：to begin, or to begin using or doing something:开始，或开始使用或做某事：

例句：A fight almost broke out.差点打起来了。

例句：I was afraid I was going to break out crying.我害怕自己会突然哭出来。