It may also explain some of the greening that has swept down the mountain's south-eastern flank; water from higher up may be percolating through rock and soil.
它也可以解释山的东南坡自上而下的绿化过程：生成于较高地势的水可以通过岩石和土壤渗流下来。
Nitrates produced in excess of the needs of plant life are carried away in water percolating through the soil.
植物生存所需要的过量硝酸盐通过土壤渗滤而被带到水中。
Mulch trickle irrigation results not only in the diminution of soil water evaporation, but also in the prevention of water percolating into deep soil.
膜下滴灌技术不仅可减少地面水分蒸发，还可以避免深层渗漏。
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