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.
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.
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.
他们比较了取自火山爆发期次的喷发早期的火山灰和取自典型火山喷发的喷发后期的火山灰。
They compared ash that was ejected in the early, explosive phase of the eruption with ash from a later, more typical eruption of the volcano.
这些呈现出橙色的水珠深藏在月球的内部，在月亮还处于活跃期的时候，因为火山喷发而形成。
The orange-coloured beads came from deep within the lunar interior during volcanic eruptions long ago when the moon was still geologically active.
在冰岛火山喷发时发出了一个冰川对北美飞驰，一个家庭的斗争??逃避未来冰河期的冲击。
When a volcanic eruption in Iceland sends a glacier hurtling toward North America, a family struggles to escape the onslaught of the coming ice age.
当冰岛火山喷发发出了一个冰川对北美飞奔，一个家庭奋力斗争，以逃避未来冰河期的冲击。
When a volcanic eruption in Iceland sends a glacier hurtling toward North America, a family struggles to escape the onslaught of the ppping ice age.
在幕式构造作用下，滦平盆地经历了5期火山喷发和构造沉降演化阶段。
This basin underwent 5 evolution stages including volcanic irruptions and tectonic subsidences under the actions of episode tectonic movements.
海南岛西北岸有晚更新世以来二期火山活动，共5次喷发，沿海岸密集的火山喷发孔、岩流堆积，构成了独特的海蚀型火山港湾岸。
There have been two periods of volcanism with 5 eruptions in the area of northwestern Hainan Island. The first one occurred in late Pleistocene, dating back to 5.2X104 a B.
牛头山古火山历经四期喷发，地表可见四层喷溢相玄武岩层和两处火山颈相岩石出露。
The porosity and permeability of typical basaltic rocks have been analyzed. Four effusive facies basalt layers and two volcanic necks with rock outcrops can be identified.
牛头山古火山历经四期喷发，地表可见四层喷溢相玄武岩层和两处火山颈相岩石出露。
The porosity and permeability of typical basaltic rocks have been analyzed. Four effusive facies basalt layers and two volcanic necks with rock outcrops can be identified.
应用推荐