犯罪学者学格雷格·纽博尔德说，以一种难以解释的循环方式忽上忽下，减少没有简单的解决方法。
Criminologist Greg Newbold says that crime rates spiral up and down in unexplained cycles and there are no easy solutions to reducing crime.
人类攻击性问题一直是社会学，心理学，犯罪学等领域众多学者关注的热点问题。
Human aggression has been a hot issue in sociology, psychology, criminology and other subjects.
人类攻击性问题一直是社会学，心理学，犯罪学等领域众多学者关注的热点问题。
Human aggression has been a hot issue in sociology, psychology, criminology and other subjects.
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