过滤净化 filtration purification ; filtration
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自然净化过程 natural purification process
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通过砂坝底下建造地下管道或者在沙中开挖蓄水洞，便可以在雨后连续几个月内抽取这些自然净化过的水。
Clean water can be drawn for up to several months after the rains have fallen through pipes underneath the DAMS or by digging a hole in the sand.
公园设在已经净化和整洁过的主办奥运会的场地内，这个公园被认为是给奥运会设定某种气氛的关键因素并且为该区献上一份持续性的遗产。
The park, set within land that has been decontaminated and cleaned up to host the Olympics, is considered a key factor in setting a tone for the games and providing a lasting legacy for the area.
净化过的水将被储存在水箱内以备不时之需。
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