After Wushan, all other clouds are mere puffballs above.翻译过来是什么意思？

After Wushan, all other clouds are mere puffballs above
除却巫山不是云。

完整的：
原诗句"曾经沧海难为水，除却巫山不是云"

英文翻译为:
The blue sea makes all other waters unworthy of the name,
After Wushan, all other clouds are mere puffballs above。