to play back sth or to play sth back
+ message, tape, film(录完后)播放, 放送
He bought an answering machine that plays back his messages.他买了一台能播放录音留言的电话答录机。
It's a good system. It allows you to play the film back immediately.这个系统不错, 电影在录完后可以马上播放。
I played the tape back.我把磁带回放了一遍。