1. （火山）喷发，爆发
    When a volcano erupts, it throws out a lot of hot, melted rock called lava, as well as ash and steam.

    e.g. The volcano erupted in 1980, devastating a large area of Washington state...
           那座火山在1980年喷发，摧毁了华盛顿州大片地区。
    e.g. Scientists say Mount Pinatubo could erupt again soon.
           科学家说皮纳图博山近期可能会再次喷发。

2. （冲突、战斗等）突然发生，爆发，突然加剧
    If violence or fighting erupts, it suddenly begins or gets worse in an unexpected, violent way.

    e.g. Heavy fighting erupted there today after a two-day ceasefire...
           在停火两天后，今天那里爆发了激烈的战斗。
    e.g. Violence erupted as the boys were driven away in two police vans.
           两辆警车将男孩们带走时突然发生了暴力冲突。

3. （某地）爆发动乱;（人群）突然暴怒，发生骚乱
    When people in a place suddenly become angry or violent, you can say that they erupt or that the place erupts .

erupt的翻译

    e.g. In Los Angeles, the neighborhood known as Watts erupted into riots...
           在洛杉矶，一个叫做沃茨的街区爆发了动乱。
    e.g. This region which had been relatively calm erupted in violence again this spring.
           已经相对平静的这个地区今年春天再次爆发暴力事件。

4. （感情）迸发，突然转变;（常指）变得狂躁
    You say that someone erupts when they suddenly have a change in mood, usually becoming quite noisy.

    e.g. Then, without warning, she erupts into laughter...
           然后在没有任何征兆的情况下，她突然大笑起来。
    e.g. Newman fled barefoot as the cheated husband erupted in fury.
           被戴绿帽的丈夫勃然大怒，纽曼吓得光着脚逃走了。

5. （斑疹等）突然出现，冒出
    If your skin erupts, sores or spots suddenly appear there.

    e.g. At the end of the second week, my skin erupted in pimples.
           第二周周末，我的皮肤上突然出现了丘疹。