It is still difficult to develop indicators for many concepts used in social science.
为社会科学领域
许多概念确立一个指
很难。
It is still difficult to develop indicators for many concepts used in social science.
为社会科学领域许多概念确立一个指很难。
(figurative) It was the study of history that gave birth to the social sciences.
历史
孕育了社会科学。
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