Typology is ment to research complex paradigm to criminology. an important sociology research paradigm, and a new analyzing instrusocial problems.

类型学是一种非常重要的社会学研究范式，是研究复杂社会问题的一种新型分析工具。

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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。

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But background checks would not have stopped most school shootings, in which the gunmen took legally obtained weapons from parents with spotless backgrounds, says Jack Levin, a professor of sociology and criminology at Northeastern University in Boston.

BBC: US gun debate: Could Obama's guns plan work?

Jack Levin, a professor of sociology and criminology at Northeastern University in Boston, pointed to several factors behind the strength of white supremacist groups, including a flagging economy and the election of the country's first black president.

CNN: STORY HIGHLIGHTS