But sometimes the temperature underground is simply too hot and vaporizes the water, or the opening at the surface is above the water level. In such a place only steam escapes, and the result is not a hot spring but a fumarole or a sulfur cauldron, which is where hydrogen sulfide gas escapes.
但有時地底的溫度實在太高，把水煮成水蒸氣噴出，或是裂隙開口高於地下水層，只能讓蒸汽冒出，就不能稱為溫泉而叫做噴氣孔了。