volcano

volcano
(pl. -oes -os)
  1. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapour, and gas are or have been erupted from the earth's crust
    火山
    ■(figurative)an intense suppressed emotion; a situation liable to burst out suddenly
    (喻)被抑制的强烈情感;随时可能爆发的状态
    what volcano of emotion must have been boiling inside that youngster.
    什么样的强烈情感会是在那年轻人心中沸腾啊。
  2. Volcanoes occur where molten magma is able to rise to the earth's surface to be erupted as lava. They are found mainly at the margins of the crustal plates such as the Mid-Atlantic Ridge and around the rim of the Pacific Ocean. Much of the driving force for eruptions comes from the release of dissolved gas and vapour from the magma as it rises. The kind of activity shown by a volcano depends on the chemistry of its magma: fluid, basic (silica-poor) lavas are erupted smoothly and effusively, as in the Hawaiian volcanoes, whereas viscous, acidic (silica-rich) lavas are erupted violently and explosively. Spacecraft have discovered volcanoes on Mars, Venus, and Jupiter's satellite Io
语源
  1. early 17th cent.: from Italian, from Latin Volcanus 'Vulcan'
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