musical note

例句：

1. 1. The composer played a musical note on the piano.
   作曲家在钢琴上弹奏了一个音乐音符。
2. 2. She hummed a musical note to herself while walking in the park.
   她在公园散步时哼唱着一个音乐音符。
3. 3. The musician played a musical note that perfectly matched the rhythm of the song.
   这位音乐家演奏的音乐音符完美地与歌曲的节奏相匹配。