Here is the center of an extinct volcanic field.

这儿是一片死火山的中心地带。

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Is the world's most complete one of the extinct volcanic peaks.

是世界上最完整的死火山口之一。

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Evidence collected by the spacecraft on Mars shows some present volcanic action, though the volcanos are believed to be dormant if not extinct.

太空船搜集到的证据显示火星上仍然有火山运动存在，然然人们普遍认为火星上的火山如果说不是死活山至少也处于休眠状态。

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On our first day on Maui, we took a ship-organised excursion to the steepling gorge of Iao Valley State Park, where misty wisps of cloud leant a volcanic air to the long-extinct peaks.

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