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감정의 표현과 조절- 여성과 남성은 정말로 그렇게 다른가?
자폐증의 원인은 무엇인가
빅 히스토리 (Big History)
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Anatomy of a muscle cell
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Technology in World War I .
World Waste: Recycling Cities and Sav...
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How the heart actually pumps blood