It is only in the study of man himself that the major social
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主要社会科学被本地变化代替

主要社会科学被本地变化代替,本句是个强调句:It is +被强调的成分+that+其他成分,去掉it is..that,

in the study of man himself ,the major social sciences have substituted the study of one local variation.

在人类自身研究方面,主要社会科学被本地变化代替