Social science is that branch of intellectual enquiry which seeks to study humans
问题描述：
Social science is that branch of intellectual enquiry which seeks to study humans
which,是代指的是Social science ,为什么不是 intellectual enquiry
答
代的是that branch of intellectual enquiry ,中心词是branch,它再回指social science,不是直接修饰social science,虽然在意义上是它,但结构上不是,不能混淆.
社会科学是智性探索（好像没见过比较合适的翻译,暂且这样翻译吧）中那个寻求研究人类（.）的分支.