estaban enfriando
-they/you were cooling
Imperfect progressiveellos/ellas/ustedesconjugation ofenfriar.

enfriar

Es solo que los McNuggets se estaban enfriando.
It's just that the McNuggets were getting cold.
Solo dos de las tres bobinas del circuito se estaban enfriando.
Only two of the three coils in the loop were being cooled.
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