chord of a foil

例句：

1. 1. The music has a beautiful chord in the middle.
   这首歌的中间部分有一个美妙的和弦。
2. 2. The conductor played a perfect chord to start the performance.
   指挥家演奏了一个完美的和弦来开始表演。
3. 3. She hummed a simple tune with a pleasant chord.
   她哼唱着一首简单的曲子，旋律很悦耳。