n. chockstone
世界上大部分的饮用水——适合饮用的淡水——是由地下水提供的，它储存在岩石的孔隙和裂缝中。
Most of the world's potable water—freshwater suitable for drinking—is accounted for by groundwater, which is stored in the pores and fractures in rocks.
通常独居在岩石裂缝或岩洞中。
They generally live singly in crevices or in burrows under rocks.
攀登者必须在岩石中寻找裂缝，这些裂缝是他们手脚所能着力的地方，从而帮助他们向上攀登。
Climbers must look for cracks in the rock. They place their hands and feet in the cracks and then work their way up.
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