addition file的用法和樣例：
例句
- Adding a file or page might require repeating some of the roll forward.
添加文件或頁可能需要重複某些前滾。 - This behavior occurs because Windows Setup requires additional files and folders to be present in the installation directory.
以上是微軟的網站對此問題出現做出的解釋，意思就是說系統安裝需要在目前的安裝目錄里添加文件和文件夾。
