固国不以山溪之险。
It's not high mountains and deep valleys that best serve to defend a country.
《新英汉大辞典》
救世主山溪水中的血液中区。
Blood of Christ mountain stream.
youdao
在急速的山溪中，苔藓可能实际上形成纯组合。
In swift mountain streams bryophytes may actually form pure societies.
曾经是很清澈的山溪，现在受到污染，变得混浊了。
The once clear mountain stream is now polluted and opaque.
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