The mineral content of groundwater normally increases with the depth, but even quite shallow aquifers can be highly saline.

地下水的矿物含量通常随深度的增加而增加，但即使很浅的蓄水层中可能含盐量也很高。

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The artists were highly skilled at using, or even enhancing, the natural shape of the cave walls to give depth and perspectives to their drawings, the sense of motion and vitality in these animals.

艺术家们高度熟练地使用，甚至增强了洞穴墙壁的自然形状，使他们的绘画具有深度和透视感，以及这些动物的动感和活力。

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Often the depth of their scars is not even close to the depth of heart pain that came with those scars.

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What kept going up even in the depth of the worst recession since the 1930s?

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House prices had gotten so high that there were fewer eligible candidates for new purchases even at the depth to which standards had sunk.

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