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。
Polka: a lively round dance originating in Bohemia and performed by couples.
给出每一条绳索的描述，请找出，成功跳了圆舞的奶牛有多少个组合？
Line 1: a single line with a single integer that is the number of groups successfully dancing the Round Dance.
在这个沾亲带故的小世界里，乐趣当然是要有的：可囗的饮食，温柔的微笑，茂盛的果树，还有那翩翩跶跶的几曲圆舞。
Therefore it is necessary…to take pleasures in the little world:good food, gentle smiles, fruit trees in bloom, and waltzes.
第二天，流浪者似乎看见死神把骑士带走，拖进了一个“骷髅舞”的圆阵中。
The next day, the Rangers seemed to see the death knight away, dragged into a "dancing skeleton" of the circular array.
一种四方舞造型；成对的人在一圆圈内逆时针的前进。
A square dance figure; couples march counterclockwise in a circle.
汪圆清是编舞、视觉设计师。
舞成一个十全十美的圆。
舞成一个十全十美的圆。
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