经过长时间被水和风的侵蚀所形成的的翻译：After a long period was formed by water and wind erosion 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

After a long time to be formed by water and wind erosion of

After a long period was formed by water and wind erosion

Is formed after the long time by the water gentle breeze corrosion

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After a long period was formed by water and wind erosion