irruption

• 名词，指突然、急剧或猛烈的侵入、涌入或激增，常用于生态学或一般语境中描述快速的变化或大量出现。

A noun referring to a sudden, violent, or abrupt entry, increase, or occurrence, often used in ecological or general contexts to describe a rapid change or influx.

1. Sudden violent entranceC1formal

   A sudden, forceful, or violent entry into a place or situation.

   突然入侵

   • The irruption of the crowd into the building caused chaos.
   • The police prepared for an irruption of protesters into the square.
   • The sudden irruption of the storm disrupted the outdoor event.

   同义词forayincursioninrushintrusioninvasionpenetrationraid

2. Population increaseC2formalscientific

   A sudden, sharp increase in the number of individuals in a population, often in ecology.

   种群激增

   • The irruption of the locust population devastated the crops.
   • Ecologists studied the irruption of the rabbit species in the region.
   • An irruption of birds was observed after the mild winter.

   同义词boomoutbreakproliferation

3. Sudden occurrence of undesirable conditionC1formal

   A sudden, violent, and often spontaneous occurrence of something negative.

   不良状况的突然爆发

   • The irruption of violence in the city was unexpected.
   • An irruption of disease swept through the community.
   • The irruption of panic among the crowd was immediate.

   同义词eruptionflare-upoutbreakoutburstupsurge