They dance in a round.

他们围成圆圈跳舞。

《新英汉大辞典》

Polka: a lively round dance originating in Bohemia and performed by couples.

波尔卡舞源于波西米亚并由双人来表演的一种活泼的圆舞。

youdao

In one country dance, dancers formed a circle. This dance was called a round.

其中一种乡村舞叫圆周舞，要求所有的跳舞者组成一个圆圈。

youdao

Wozniak, who beat out former Go-Go's lead singer Belinda Carlisle after a dance-off in an earlier round, kept his smile throughout the storm of criticism.

CNN: Fans keep Wozniak 'Dancing With the Stars'

Kepler-37b is a tad larger than our heavenly dance partner, the Moon, and whizzes round a star much like our Sun, with two larger planets in its system for company.

ENGADGET: NASA's Kepler telescope spies smallest planet to date, no aliens