从文本中提取主题串是自然语言处理的重要基础之一。

Subject extraction from a text is very important for natural language processing.

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对于匹配TOPIC对象的主题字符串，以及主题树中该主题字符串之下、没有定义与之匹配的TOPIC对象的各个主题，此TOPIC对象为它们提供默认设置。

The topic object provides default Settings for the topic string that matches it, as well as topics under it in the topic tree that do not have a topic object defined to match them.

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您可以通过添加新的资源包到这个目录来增加新的字符串到主题。

You can add new strings to the theme by adding new resource bundles to this directory.

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