This is because geologists find them by listening for the tell-tale boiling water using hydrophones, but at extreme depths the pressure is too high for water to boil.
这是因为，地质学家通过用水中听音器听取翻滚的水来确定火山的存在，当火山位置极深时，水压太大以致火山爆发也不能引起水翻滚。
If this liquid were heated to a high enough temperature to boil it under normal atmospheric pressure many of the hydrocarbons in it would decompose.
如果这些液体在通常的大气压下加热到足够的温度而沸腾，其中许多碳氢化合物会分解。
This technology is different from chemical boil foam, high pressure water jet, medium frequency heated and other cleaning technology.
该技术不同于化学煮泡、高压水射流、中频加热等清洗技术。
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