水滴石穿，英语可以翻译为 "dripstone"，是一种由矿物沉淀形成的岩石，常见于溶洞中。它的来源可以追溯到溶洞形成的过程。当地下的水流经过岩石裂缝时，矿物质会沉淀在岩石表面上，形成水滴状的结构，从而形成了水滴石穿。

例句：

The stalactites and stalagmites in the cave were formed by dripstone. (洞穴里的钟乳石和石笋都是水滴石穿形成的。)

The dripstone formations in the cave were breathtaking. (洞穴里的水滴石穿景色令人叹为观止。)