were twiddling
Past progressiveconjugation oftwiddle.There are other translations for this conjugation.

twiddle

And although the Commission did not have enough time to boost the egos of certain Members who were twiddling their thumbs in their hotel, it is certainly not a tragedy.
Y no es ninguna tragedia el que la Comisión no hubiera tenido suficiente tiempo para alimentar el ego de algunos diputados que se estuvieron rascando la barriga en el hotel.
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