chord of arch

例句：

1. 1. The music has a beautiful chord that makes me feel happy.
   这首音乐有一个美妙的和弦，让我感到快乐。
2. 2. The conductor plays the chords for the orchestra to follow.
   指挥家为管弦乐队演奏和弦。
3. 3. The singer needs to learn how to play the chords correctly.
   歌手需要学会正确地演奏和弦。