当厚厚的岩浆和气体大量在地表下聚集起来，就会出现爆炸性喷发，将熔岩，岩石和火山灰喷向空中。
When thick magma and large amounts of gas build up under the surface, eruptions can be explosive, expelling lava, rocks and ash into the air.
这是不可能不知道猜测在极不可能爆发爆炸性和材料总量的喷发产生的后果发生。
It is impossible to know the effects of the eruption without guessing at the explosivity of the highly unlikely eruption and the total amount of the material erupted.
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