graded down 中文意思是什麼
graded down
解釋
按比例折減-
The upstream monitoring station, located near the village of tseng lan shue, was graded fair in 2005. interestingly, this stream gets better as it goes down. the watercourse falls steeply in mid - stream, creating strong aeration which aids the rivers self - cleansing abilities
位於井欄樹村附近的上游監測站jr3於2005年錄得普通水質，但河道中下游水質則較佳，原因是井欄樹溪中游地勢高，水瀉急，水中的含氧量增加，而河道凈化能力亦相應提高。
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