three-ring binder
noun [ C ] US uk/ˌθriːˌrɪŋ ˈbaɪn.dər/ us/ˌθriːˌrɪŋ ˈbaɪn.dɚ/
三环活页夹
a type of ring binder (= a piece of stiff folded material with metal rings inside for holding loose pages in position) that has three metal rings
The documentation has filled roughly two dozen three-ring binders that are locked away in file rooms. 这些文件已经装满了大约二十几个三环活页夹，锁在档案室里。
Instead of getting a three-ring binder, new employees get a pocket-sized notepad with eight blank pages. Everything else they need to know is online. 新员工得到的不再是三环活页夹，而是一个口袋大小的记事本，上面有八页空白页。他们需要知道的其他一切信息都在网上。
- More examples
- The classroom had filled with 36 students, each leafing silently through a fat three-ring binder.
- "The records for one patient can fill a three-ring binder," she said.
- He asked that documents be hole-punched to fit a three-ring binder.