科学家们认为土卫二冰火山的活跃时间只占其寿命时间的1%到20%，幸运的是，卡西尼号飞越土卫二的时候正好赶上了喷发期。

Scientists believe the cryovolcanism on Enceladus has only been active during 1 to 20 percent of its existence. We’re glad Cassini caught it in an eruptive phase.

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这座火山于冰河世纪进入活跃期，最后一次喷发是在1986年。

The volcano became active during the glacial period. The last eruption was in 1986.

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这座火山于冰河世纪进入活跃期，最后一次喷发是在1986年。

The volcano became active during the glacial period.The last eruption was in 1986.

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