Very slowly, wind, water and ice wore away the rock.

风、水和冰缓缓地侵蚀着岩石。

" To ice skate" means to move across a flat piece of ice, wearing special shoes that have what are called " blades" (blades) on them.

“to ice skate” 的意思是在一块平坦的冰面上移动，穿着特殊的鞋子， 上面有所谓的“刀片” （blades）。