sociology
他的社会学研究分析了家庭结构对儿童教育的影响。
His ___sociology research analyzes how family structures influence children's education.
他在大学里教授社会学，研究不同文化的社会结构。
He teaches ___sociology at the university, studying social structures across cultures.
他对社会不平等问题很感兴趣，所以决定专攻社会学。
He decided to specialize in ___sociology because of his interest in social inequality issues.