例如：用深井泵或潜水泵直接从地下取水的用户供热系统锅炉变频定压补水系统。
For example: Diving deep-well pump or pump water directly from the ground floor of the boiler heating system users frequency constant pressure replenishment system.
圣安东尼奥已尝试从很多地下水保护区获取水资源。
San Antonio has attempted to secure water from a number of Texas groundwater conservation districts.
如果从河流或地下取水，每立方米的成本可大幅降至10至20美分，农业用水的成本甚至更低。
But switch the source to a river or an aquifer, and the cost of a cubic meter of water can plummet to 10 to 20 cents, and farmers often pay far less.
在许多国家，由于没有严格限制或执行的条例，人们可以随意从地下含水层中压泵取水。
In many countries people can pump as much water as they like from underground aquifers, because rules are either lax or not enforced.
黑暗精灵的水银原来一直短缺，直到有一天一位聪明的炼金术士发明了从地下苔藓萃取水银的方法，这种窘境才得到改观。
The Dark Elves were always short of mercury, until one clever alchemist figured out how to extract it from subterranean lichen.
黑暗精灵的水银原来一直短缺，直到有一天一位聪明的炼金术士发明了从地下苔藓萃取水银的方法，这种窘境才得到改观。
The Dark Elves were always short of mercury, until one clever alchemist figured out how to extract it from subterranean lichen.
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