你知不知道，石仅仅是一个岩石，直到它被开采吗？
Did you know that stone is just a rock until it's been quarried?
现今，一条配有长长铁轨的联合开采机不断啃噬着旧海床10英尺厚的盐层，直到它被推行11英里回到盐厂进行清洗和沉淀。
Nowadays, a great rail-mounted combine chews away at a 10-foot-thick layer of salt in the old seabed, before it is towed 11 miles back to the plant, and washed and ground.
目前它被应用于生活污水、工业废水、矿山及石油开采废水、农业点源和非点源以及水体富营养化的治理。
By now, it was widely applied to treat municipal wastewater, industrial wastewater, mineral wastewater, oil exploit wastewater, non-point resource pollution and eutrophication treatment.
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