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Ke Xue Zhi Shi . Ke Xue Zhi Shi Zi Ran Ke Xue .
Ben juan nei rong bao kuo:yu zhou, Di qiu, Sheng wu jie, Ren ti yu yi xue, Ke xue zhi shi wu bu fen nei rong.
Ben juan nei rong bao kuo:yu zhou, Di qiu, Sheng wu jie, Ren ti yu yi xue, Ke xue zhi shi wu bu fen nei rong.