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.
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。
It words by ionizing xenon gas and expelling it with the aid of electric fields, so providing a gentle but constant thrust.
它通过电离氙气，借助电磁场将氙气释放，以此提供轻柔但持续的推进力。
In general, the main expelling pathway of overpressure fluid controls gas accumulation in this area.
综合研究表明，超压流体主排放通道对该区天然气成藏具有控制作用。
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