foldern.文件夹；折叠者；折叠式印刷品folder gluer折叠胶粘机folder window文件夹窗口folder member折合库成员folder filter折叠式滤清器folder details文件夹详细资料folder of rock中夹岩folder security文件夹安全性folder metaphor文件夹隐喻folder hierarchy文件夹层次folder directory页面折叠目录

1. Display files as well as folders.
   显示文件和文件夹。
2. Click on folders to open and close them.
   在文件夹上单击可以打开或关闭它。