An aquifer is a water-bearing rock stratum such as sandstone and chalk.
地下蓄水层是一些有水的岩石层, 如沙岩和白垩岩。
An aquifer is a water-bearing rock stratum such as sandstone and chalk.
地下蓄水层是一些有水的岩石层, 如沙岩和白垩岩。
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