And so I worked on radio, and that's really my first professional engagement.

所以我在广播电台工作，这确实是我第一次从事专业工作。

The pressing nature of Mr. Northup's professional and political engagements delayed his departure until December.

Northup 先生的专业和政治事务的紧迫性将他的离职推迟到 12 月。