Add a Method builder call to navigate back to the parent folder after the user has drilled down into the folder structure.

添加一个Method构建块调用，以便在用户深入到文件夹结构以后向后导航到父文件夹。

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We adopt a semantic-based rule driven method to cut down redundancy in the text structure tree, which is quite unique and appropriate for natural language generation system.

采用一种基于语义的规则驱动方法来消除句子之间的信息冗余，从而使生成的文本更加自然流畅，增加可读性。

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In the light of the method of Top-Down, the author put forward the concept of product function structure tree, which was used to express the product's function structure during the conceptual design.

根据自顶向下的设计思想，提出了产品功能结构树的概念，并以此来描述产品的功能结构。

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