aquifers

the lower one, underlying the marine clay, contains several artesian aquifers used for drinking and economic purposes.

较低的一层在海生粘土下面，蕴含着几处用于饮用和商业用途的自流地下蓄水层。

Our aquifers are draining faster than they can be replenished, and the biggest, ogallala, which stretches from South Dakota to texas, has seen localized drops in the water table of150 feet.

我们的地下水使用比注入得更快并且更多，从南达科他州延伸到德克萨斯州的奥加拉拉的水量下降到150英尺。

These colorless crustaceans are among the few creatures that have adapted to the lightless world at the bottom of the region's aquifers, springs, and sinkholes. Many species who make their homes in these freshwater labyrinths are endemic to only a handful of aquifers and are found nowhere else in the world.

在这个无光的世界中，只有深海含水层与落水洞，犹如坠入淡水迷宫一般。这些甲壳类动物是少数几种能适应此种环境的物种，它们属于地区性生物，仅存在于少数含水层中，在世界上的其他地方都未曾发现。