It's a phrase in Chinese as a proverb which means that the mountain is so beautiful and the river is so clean.

  Query for translation equivalent of words in isolation does not make much sense, I am afraid。 You need to find a specific example as a sentence or just a fragment with the word you are looking for。

   Here are two instances I found for your reference。

1。 该国山清水秀，风景如画，群山郁郁葱葱。

New Zealand has a very beautiful natural landscape with green hills and mountains。

2。 山清水秀，丽人娇小，南国情调，风采迷人。

Green hills, clear waters and dainty Beauties present a southern tone with an attractive elegant demeanor。