英英释义：if a situation goes downhill, it gets worse
downhill 作副词一般与 go 连用，意思是“每况愈下地”。当我们想表达一件事情变得越来越糟的时候，除了说 get/become worse, worsen, deteriorate, go from bad to worse 之外，还可以用 go/slide/head downhill 来替代。
例句：It has been a tough year for many companies. Many went downhill before going bankrupt.
形容健康状况下降：
The kid’s health is going downhill because of eating too much junk food.
形容成绩下降：
His academic performance went downhill on the grounds that he was addicted to playing computer games.
形容经济状况：
With growing aging population and mounting employment pressure, economy head downhill fast.
形容环境恶化
Should the environment keep going downhill, our planet earth would be inhabitable one day soon.
