The model books for Chinese paintings are the important teaching materials as well as the patterns for the artistic creation of Chinese painters.

中国画谱是中国绘画教学的重要教材，也是中国画家艺术创作的一种样式。

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Therefore, after updating the data model, you can guarantee that any category without books has been removed and any new category has been added.

因此，在更新了数据模型之后，就可以确保其下没有书的那些类别已被删除并且所有新的类别已被添加。

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The model, dating from 1972, is also referenced in numerous management and leadership books.

自1972年开始的这一模型，也在大量的管理学和领导力书籍中被引用。

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Amazon is trying to get publishers to commit to a different model for selling books.

FORBES: Apple Signs Up Another Publisher For Its iBookstore

Apple has locked in another publisher to use its pricing model for selling e-books, Motoko Rich and Brad Stone at the NYT reports.

FORBES: Apple Signs Up Another Publisher For Its iBookstore

This suggests Amazon will have to sell Perseus Books using the agency model.

FORBES: Apple Signs Up Another Publisher For Its iBookstore