riff

例句：

1. 1. She played the guitar with a riff that was catchy and memorable.
   她用一段抓耳的旋律弹吉他。
2. 2.The band played a lively riff to get the crowd excited.
   乐队演奏了一段活泼的旋律来让观众兴奋起来。
3. 3. He strummed his guitar for a few minutes before starting to play a riff.
   他弹了一会儿吉他，然后开始弹奏一段旋律。