The cave-making recipe calls for a steady emission of volcanicgas and heat, a heavy annual snowfall at an elevation high enough to keep it from melting during the summer.
洞穴的形成需要火山气体和热量的稳定释放，海拔高到足以防止每年的大量降雪在夏季融化。
2
Nearby, super-hot volcanicgas can condense into as much as 4 tons of sulfur a day.
酸湖附近，温度很高的火山气体每天可凝结成4吨左右的硫磺石。
3
Therefore, the paper carried out the completion optimization of Changling volcanicgas reservoir.