ogallala aquifer,ogallalaaquifer
托福阅读真题练习:depletion of the ogallala aquifer蓄水层
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5]【奥加拉拉蓄水层的枯竭】depletion of the ogallala aquifer
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预订 nile valley aquifer in egypt [9783659307638]
recharging the ogallala aquifer
groundwater withdrawal rates from the ogallala aquifer in the