Documents can be any kind of text material.
文档可以是任何类型的文本材料。
The text material of Probability Statistics compiled by Zhang Yaoting is a textbook with deep exploring colour.
张尧庭主编的《概率统计》教材，是一部探索性色彩浓厚的教科书。
The text material of Probability Statistics compiled by Zhang Yaoting is a textbook with deep exploring colour.
张尧庭主编的《概率统计》教材，是一部探索性色彩浓厚的教科书。
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