volcanoes

• Then the gas pressure builds up until the volcano erupts .
  这样，气体压力就会越来越大，以致引起火山爆发。
• Swanson was in his car driving toward the volcano when it blew .
  斯旺森在火山喷发时，正在驶向火山的汽车里。
• "it cannot be anything but a volcano in a state of eruption", said he .
  “这不会是别的，是座活火山”，他说。
• The volcanoes threw millions of tons of ash and smoke into the air .
  这些火山喷射出千百万吨灰烬和烟尘到大气中。
• Few people have been harmed physically by molten lava flowing from volcanoes .
  被火山喷溢出的熔岩伤身体的人不多。
• Similar events have been observed only a few times before at other volcanoes .
  类似的情况，以前在其他一些火山上只观察到几次。
• He has been able to tell us more about active volcanoes than any man alive .
  他能够比当今的任何人讲述更多的关于活火山的情况。
• If the volcano becomes inactive and cools, surrounding rock may be worn away .
  如果火山变得不活动并冷却下来，围岩就可能被剥蚀掉。
• Such lavas also once came from the volcanoes in the cascade range in washington .
  在华盛顿州的喀斯喀特山脉的火山也喷出过这样的熔岩。
• Because of the bulging, the already steep north side of the volcano was becoming even steeper .
  由于发生了膨胀，原来已很陡的火山北坡更陡了。