jīng / guò / duō / nián / de / fēng / huà / zhè / xiē / dòng / wù / de / gǔ / hái / yǐ / jīng / shí / fēn / cuì / ruò

经过多年的风化，这些动物的骨骸已经十分脆弱。

After years of weathering, the bones of these animals have become very fragile.