has been sparring
Present perfect progressivehe/sheconjugation ofspar.

spar

Recently, there has been sparring on the nuclear issue: safety is best served by not using nuclear power, but avoiding it and holding back from it on the grounds that it does not benefit our future.
Recientemente ha habido discusiones sobre la cuestión de la energía nuclear: lo mejor para la seguridad es no utilizar la energía nuclear, sino evitarla y descartarla por el hecho de que no favorece nuestro futuro.
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