caldera [kɒlˈdɪərə]

例句:

• The mountain is encircled by the doughnut - shaped depression of the caldera.
  山为环形的破火山口洼地环抱着.
  
• It rotated to north polar region, zoomed into ice fields , and then down a volcanic caldera.
  它转向北极地区, 放大冰原,深入一个火山口.
  
• Much of Yellowstone National Park is a giant collapsed volcano, or a caldera.
  黄石国家公园的大部分地方是一座坍塌的大火山, 或是一个喷火山口.
  
• This is called a caldera. Yellowstone Yellowstone is one example of a supervolcano.
  来自BBC
• Finally, we reached the top and peered into the volcano's caldera.
  来自WSJ
• This would tell you how how much pressure it would take to fracture the rocks over the Caldera.
  来自SA