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Volcano
mountain or hill with an opening or openings through which lava, cinders, gases, etc come up from below the earth's surface (an active volcano), may come up after an interval (a dormant volcano), or have ceased to come up (an extinct volcano)
火山
an active volcano为活火山
a dormant volcano为休眠火山
an extinct volcano为死火山
Haroun Tazieff, the Polish scientist, has spent his lifetime studying active volcanoes and deep caves in all parts of the world.
波兰科学家哈罗恩·塔捷耶夫花了毕生的精力来研究世界各地的活火山和深洞.
spend some time (in) doing sth. 花多少时间干……
lifetime
the length of time that sb lives or that sth lasts
n. 毕生精力
His diary was not published during his lifetime.
a lifetime of experience
He had spent a lifetime trying to please his father.
spend most of his lifetime 花了毕生大部分精力
spend his lifetime 花了毕生精力
in all parts of the world 世界各地的
