plagals造句

• Although the earlier ( Greek ) model for the Carolingian system was probably ordered like the Byzantine " oktM
  
  chos ", with the four authentic modes first, followed by the four plagals, the earliest extant sources for the Latin system are organized in four pairs of authentic and plagal modes sharing the same final : protus authentic / plagal, deuterus authentic / plagal, tritus authentic / plagal, and tetrardus authentic / plagal.