1. As he gets older his health goes downhill.2. The global economy is still going downhill despite aggressive efforts to repair it.
 go downhill get worse可以普遍用在很多情況
他越老健康越日漸衰退. 全球的金融一直再衰退, 即使大家都努力要讓它恢復.
What have you learned from your friend's drunken car acident?