桦树皮文化是人类原始文化的组成部分。
The birch bark culture is an component part of the primitive human culture.
神秘数字起源于原始文化，遗存于文明社会的文化里。
Mysterious Numbers originated from ancient culture, existing in the culture of civilized society.
该民族的文化由原始转变为较文明的阶段。
The culture of the people passed from a primitive to a more civilized stage.
该民族的文化由原始转变为较文明的阶段。
The culture of the people passed from a primitive to a more civilized stage.
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