那位杂技演员在绳索上表演了惊人的平衡技巧。

The ___acrobat performed incredible balancing tricks on a tightrope.

这位杂技演员在钢丝上翻跟斗时像羽毛一样轻盈。

The ___acrobat performed flips on the tightrope as lightly as a feather.

在辩论中，他像个语言杂技演员般灵活变换立场，以迷惑对手。

During the debate, he acted like a verbal ___acrobat, nimbly switching stances to confuse opponents.