dangyeseol
stage theory
théorie des étapes ; théorie des phases ; théorie des stades
단계설은 인간 발달을 여러 단계로 나누어 설명합니다.
dangyeseol-eun ingan baldal-eul yeoreo dangdae-ro nanueol seolmyeonghamnida.
Stage theory explains human development by dividing it into several stages.
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