Social science is that branch of intellectual enquiry which seeks to study humans and their endeavors in the same reasoned,orderly,systematic,and dispassioned manner that natural scientists use for the study of natural phenomena.句中第一个that 在句中起什么作用?
问题描述：
Social science is that branch of intellectual enquiry which seeks to study humans and their endeavors in the same reasoned,orderly,systematic,and dispassioned manner that natural scientists use for the study of natural phenomena.
句中第一个that 在句中起什么作用?
答
那个 (特指）