For example, each document contains several standard keywords, such as date and subject description.

例如，每个文档都包含一些标准关键词，例如日期和主题描述。

youdao

For example, each document contains several standard keywords, such as date and subject description.

例如，每个文档都包含一些标准关键词，例如日期和主题描述。

youdao