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。
〈喻〉 被抑制的强烈情感;随时可能爆发的状态
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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。
"early 17th cent.: from Italian, from Latin