And about two or three years after they can hear as well as you and I can, they'll be able to hear maybe how bats sing, or how whales talk, or how dogs talk, and other types of tonal scales.
E due o tre anni dopo averci raggiunti, magari saranno in grado di sentire i pipistrelli, o il canto delle balene, o i cani, e altri tipi di scale tonali.