注意，此处有两种不同类型的索引标记。

Notice the two different types of index tags here.

youdao

已经存在，并且是主索引标记或候选索引标识。

Already exists, and is a PRIMARY or CANDIDATE index tag.

youdao

清单1是一个示例content . xml文件，其中含有多处索引标记。

Listing 1 is a sample content.xml file with several index tags in place.

youdao

清单1是一个示例content . xml文件，其中含有多处索引标记。

Listing 1 is a sample content.xml file with several index tags in place.

youdao