Riding a bike with only one wheel is a balancing act—that's why unicycles are used in the circus.

骑着只有一个轮子的自行车是一种平衡表演——这就是为什么独轮车被用于马戏团的原因。

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Once Mulla Nasrudin knocked at the door of the manager of a great circus, and he said: You have to look at me, I have a terrific act!

一次摩拉·纳斯·鲁丁敲一位大马戏团经理的门，他说：“你必须看看我，我有精彩的表演！”

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However, when the three animals grew accustomed to each other they made a most successful circus act.

然而当这三个动物彼此适应时，它们就成功地为马戏团表演了。

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Between events,just as in a circus, rodeo clowns act silly to entertain children in the audience.

VOA: standard.2010.01.25

Mr. JARRETT: Anything I'm doing on stage that looks like it's part of a circus act is something I would rather not do.

NPR: Keith Jarrett's Audience Connection

"I don't want to be a circus act, " Hopkins said.

WSJ: A champ at 48, Bernard Hopkins could keep fighting

It was a sporting tragedy that Gascoigne had to end his playing days in the lower divisions of English football before a stint with a second-rate Chinese outfit left him as little more than a novelty circus act for a curious nation.

BBC: The tears and joy of Gazza