C2 When a volcano erupts, it explodes and flames and rocks come out of it.（火山）喷发，爆发
Inner-city riots erupted when a local man was shot by police.
Violence erupted in the city on Friday night.
A big diplomatic row erupted as a result.
Spontaneous demonstrations erupt almost daily.
A legal fight has erupted between two of the world's largest oil companies.
to start suddenly and violently突然发生
to suddenly express your feelings in a noisy way（感情的）爆发；剧烈地表达（感情）
If spots erupt on your skin, they suddenly appear.（疱疹）突然出现