马戏团的杂技演员在绷紧的绳索上表演了精彩的平衡动作。

The acrobat performed amazing balancing tricks on the ___tightrope.

作为经理，他必须在员工满意度和公司利润之间走钢丝。

As a manager, he is walking a ___tightrope between employee satisfaction and company profits.