For example, I was part of a student TV station that broadcast news bulletins around the campus, and during an appointment which was running very late, I said, "I'm sorry, doctor, I've got to go.
Por exemplo, eu participava de  um canal de TV estudantil que transmitia boletins  de notícias pelo campus, e durante uma consulta, que estava  ocorrendo muito tarde, eu disse: "Desculpe-me, doutor, preciso ir.