I spent a few days sampling the literature of social science.我花了几天时间浏览有关社会科学的文献。Economics is a social science.经济学是一门社会科学。It is still difficult to develop indicators for many concepts used in social science.为社会科学领域的许多概念确立指标仍然很困难。Human ecology is a branch of social science.人文生态学是社会科学的一个分支。