Slums are hotbeds of crime and disease.
贫民窟是滋生犯罪和疾病的温床.
辞典例句
Loosely managed teams can become hotbeds of distraction—employees routinely complain that they can't get their work done because they are forced to spend too much time in meetings or compelled to work in noisy offices.
2017年6月四级真题（第三套）阅读 Section B