1. The show's signature tune is instantly recognizable by fans.
该节目的标志性旋律能让粉丝们立刻辨认出来。

2. As soon as the signature tune played, the audience started cheering.
标志性旋律一响，观众就开始欢呼起来。

3. Every great cartoon has its own signature tune.
每一个优秀的动画片都有其专属的标志性旋律。

A: Do you recognize the signature tune playing on the radio?
A：你能听出广播里播的那个标志性旋律吗？

B: Yes, it's from that famous detective show.
B：是的，是那个著名的侦探节目的。

1) 标志性旋律

2) 节目主题曲

3) 识别用乐句

1. 标志性旋律

e.g.
The theme music was the show's signature tune.
这段主题音乐就是该节目的标志性旋律。

noun

1. A piece of music used to identify a particular person, program, or brand.

Synonym: theme song