户外音乐会因突如其来的雷雨取消后，人群迅速散去了。
The crowd dissipated quickly after the outdoor concert was cut short by a sudden thunderstorm.
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解释
dissipated 在此指人群因突发情况迅速分散消失
The crowd dissipated quickly after the outdoor concert was cut short by a sudden thunderstorm.
dissipated 在此指人群因突发情况迅速分散消失