[xià pō lù]
downhill path; downhill journey [road]; downward slope; decline
go downhill; be on the decline
走下坡路
At that time our relations were going upwards, but since then they have been going downwards [downhill].
那時我們的關系是走上坡路, 此后就開始走下坡路了。
The customs figures show a steady decline in British trade.
關稅數字表明英國的貿易一直在走下坡路。