ring binder

US /ˈrɪŋ ˌbaɪn.dər/
UK /ˈrɪŋ ˌbaɪn.dər/
"ring binder" picture
1.

活頁夾, 環形活頁夾

a folder with metal rings that can be opened to hold punched sheets of paper

:
Please put all the handouts into the ring binder.
請把所有講義放入活頁夾
I need a new ring binder for my school notes.
我的學習筆記需要一個新的活頁夾