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1·The total stress variable principle is also applicable to the calculation of the settlement induced by drawing water in deep confined aquifers.

本文计算原理对于抽取深层承压地下水导致地面沉降同样适用。

2·But Dr Kharaka nevertheless suggests that the sequestration of carbon dioxide should be confined to deep aquifers, where overlying layers of shale would be likely to prevent leaks.

但是，Kharaka博士依然建议，二氧化碳的固存应该局限于深蓄水层，这些蓄水层上方有很多层页岩叠加在一起，可以防止泄漏。

3·There are three types of aquifers: perched, unconfined, and confined.

含水层有三种形态，分别是上层滞水、潜水和承压水。