如果有大量重复键值，这可能会导致性能大幅降低。

This could result in a significant decrease in performance should there be a large number of duplicate key values.

youdao

简单地运行两次会产生错误，因为相同的星星名称（作为表的主键）使用了两次，则会由于重复的主键值导致错误。

Simply running it twice will produce an error, because the same star names (which are the primary key for the table) are used again, causing an error with duplicate primary key values.

youdao

此外，这种技术采用了丰富的XML结构而不是键值对，允许出现嵌套的子表单和重复的元素。

Also, the technique USES rich XML structures instead of key-value pairs, allowing nested sub-forms and repeating elements.

youdao