像宽干谷这样爆裂的火山口形成于蒸汽喷发的过程中，在那里，上升的岩浆与地表下的水接触形成了蒸汽喷发。
Volcanic explosion craters such as Dallol form during phreatic eruptions—where rising magma comes into contact with water beneath the surface of the Earth, causing a steam explosion.
我第一次看到喷发出来的烟灰是白色的，非常白，就像蒸汽一样。
When I first saw the eruption plume, it was a very white, steam-rich plume.
间歇泉似的喷柱不断喷发，泥浆翻腾着，而且蒸汽从峭壁和人行道上渐渐地渗漏出来，空气中留下了硫磺气味。
Geysers erupt mud boils and steam seeps from cliffs and sidewalks leaving a sulfurous scent in the air.
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