hotbeds
n. (坏事、暴力等的)温床( hotbed的名词复数 )
If you say that somewhere is a hotbed of an undesirable activity, you are emphasizing that a lot of the activity is going on there or being started there.
...a state now known worldwide as a hotbed of racial intolerance.
举世皆知现在是滋生种族褊狭的温床的国家
Slums are hotbeds of crime and disease.
贫民窟是滋生犯罪和疾病的温床.