fànzuì lǜ xiàjiàng gēn jiētóu shèxiàngtóu shùliàng zēngjiā yǒu méi yǒu guānxì, dàjiā zhēnglùn le hěn jiǔ

犯罪率下降跟街头摄像头数量增加有没有关系，大家争论了很久。

Whether the drop in crime rate is related to the increase in street cameras has been debated for a long time.