has been scanning
-ha estado escaneando
Present perfect progressivehe/sheconjugation ofscan.

scan

It contains the most advanced receiving and recording equipment, which for many decades has been scanning the sky for signals from intelligence in outer space.
Posee los más avanzados equipos de recepción y registro, los cuales han estado indagando el cielo durante muchas décadas en busca de señales de vida inteligente del espacio exterior.
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