First, contaminants volatilize out of groundwater. 首先，污染物從地下水中揮發(fā)出來(lái)，變成蒸氣。
Elevated levels can volatilize into the air heat preservation board refrigeration water, and maintain long-term food warming effect. 架空空氣層可以揮發(fā)掉保溫板冷凝水，保持長(zhǎng)久的保溫效果。