舞会上，乐队演奏了一曲优雅的华尔兹，让成对的舞者随着轻柔的旋律旋转起舞。

At the ball, the band played a graceful ___waltz that made couples dance in gentle circles.

这支华尔兹舞曲旋律优美，非常适合在舞会上演奏。

This ___waltz has a beautiful melody and is perfect for playing at a ball.