zhè / tiáo / hé / shuǐ / de / qīng / zhuó / néng / fǎn / yìng / shàng / yóu / de / wū / rǎn / chéng / dù

这条河水的清浊能反映上游的污染程度。

The clarity and turbidity of this river can reflect the level of pollution upstream.