vicious circle
noun /ˌvɪʃəs ˈsɜːkl/
  /ˌvɪʃəs ˈsɜːrkl/
(also vicious cycle 
 [singular] /ˌvɪʃəs ˈsaɪkl/
  /ˌvɪʃəs ˈsaɪkl/
)- a situation in which one problem causes another problem which then makes the first problem worse恶性循环 - He was trapped in a vicious circle of addiction and petty crime.他深陷毒瘾和轻罪的恶性循环。 
- She can't see any way to break out of this vicious circle.她看不出有什么办法可以打破这个恶性循环。 
- Stress and fatigue can create a vicious circle.压力和疲劳会造成恶性循环。 
 
- He was trapped in a vicious circle of addiction and petty crime.