estaban refinando
-they/you were refining
Imperfect progressive ellos/ellas/ustedes conjugation of refinar.

refinar

Influenciados por las reminiscencias del canto en bailarines, peregrinaciones, retiros, tabernas y socialización entre los residentes, los jugadores y cantantes estaban refinando las características distintivas del fado, que reflejan las experiencias de cada vecindario.
Influenced by reminiscences of singing in dancers, pilgrimages, retreats, taverns and socializing between residents, the players and singers were refining the distinctive features of the fado, which mirror the experiences of each neighborhood.
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