had been maturing
-había estado madurando
Past perfect progressiveconjugation ofmature. There are other translations for this conjugation.


But there were other favorable conditions, and no less real, The proletariat, which had been maturing for half a century, showed its threatening force in June, but was incapable of seizing the power.
El proletariado, que en medio siglo había crecido, mostró en junio su fuerza amenazadora; sin embargo, resultó aún incapaz de tomar el poder.
Decanting is also carried out to aerate a wine that had been maturing in bottle for some years, allowing its delicate and complex aromas, dormant during the ageing process, to open up and express themselves.
La decantación se realiza también para airear un vino que ha estado envejeciendo en la botella durante por algunos años, permitiendo que los aromas delicados y complejos del vino, adormecidos durante el proceso de envejecimiento, se abran y se expresen.
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