欧洲最大的活火山埃特纳火山自上周以来一直产生罕见的“烟环”或“火山涡环”。 Mount Etna, Europe's largest active volcano, has been producing rare "smoke rings" or "volcanic vortex rings" since last week.

欧洲最大的活火山埃特纳火山自上周以来一直向天空产生罕见的“烟环”或“火山涡环”。 Mount Etna, Europe's largest active volcano, has been producing rare "smoke rings" or "volcanic vortex rings" into the sky since last week. 这一现象是由于快速释放的气体与埃特纳火山山顶上新火山口的独特喷口形状相结合而发生的，不会对周围村庄或卡塔尼亚机场造成任何干扰。 The phenomenon occurs when rapid gas release combines with the unique vent shape of a new crater that opened on Etna's summit, not causing any disruption in the surrounding villages or Catania airport. 地球上没有任何其他火山能像埃特纳火山一样产生如此多的蒸汽环。 No other volcano on Earth produces as many vapor rings as Etna.