N-COUNT
（暴力活动、疾病等的）爆发，突然发生
If there is an outbreak of something unpleasant, such as violence or a disease, it suddenly starts to happen.
例句
The four-day festival ended a day early after an outbreak of violence involving hundreds of youths.
一场有数百名年轻人卷入的暴力活动发生后，为期4天的节庆活动被迫提前一天结束。
...the outbreak of war in the Middle East...
中东战争的爆发