ring binder

folder for papers, in which metal rings go through holes in the edges of the pages, holding them in place 活页夹; 活页簿.

rightfully, rightly, rightness, rights issue, rigid, rigidity, rigidly, rigmarole, rigor, rigor mortis, rigorous, rigorously, rigorousness, rigour (US rigor), rile, rim, rime, rimless, rind, ring, ring mains, ring off, ring out, ring road, ring up, ring-finger, ring-pull, ring-shaped, ringer, ringleader, ringlet, ringmaster, ringside, ringworm, rink, rinse, Rio de Janneiro, riot, riot police, riot shield,