他演奏了一段优美的旋律。

He played a beautiful ___melody.

从他的竖琴中迸发出如此美妙、迷人的旋律，以至于整个城市都欢呼起来。

From his harp sprang such a wonderful, enchanting ___melody that the whole city cheered.

作曲家创作了一段难忘的旋律，在整个交响乐中重复出现。

The composer crafted a memorable ___melody that repeats throughout the symphony.