to make something that is pointed or sharp into a smooth, curved shape by rubbing it

He used a special machine to round off the corners of the old table. 他用了一台特制的机器将这张旧桌子的角打磨成圆形。

to complete an event or activity in a pleasant or satisfactory way

To round off her education, her father sent her to a Swiss finishing school. 为了让她圆满完成学业，父亲把她送进了瑞士的一所女子精修学校。

We rounded the meal off with a chocolate and rum cake. 最后我们又品尝了巧克力和糖蜜酒蛋糕，美美地吃完了这顿饭。