When I’m playing a sad tune, I am crying in my heart.
我演奏哀伤的乐曲时，自己内心也在哭泣。
sing in tune
唱得合调
be in tune with the times
跟上时代潮流
I have no ear for music. My singing is out of tune.
我不懂音乐，唱歌总跑调。
be out of tune with the times
与时代格格不入
tune in to a radio station
收听一个电台