As it drips, the water evaporates, and the dissolved matter is left on the ceiling.

水滴下时，便挥发掉，溶解的物质残留在洞顶上。

youdao

As it drips, the water evaporates, and the dissolved matter is left on the ceiling.

水滴下时，便挥发掉，溶解的物质残留在洞顶上。

youdao