马戏团的指挥员挥舞着鞭子，宣布空中飞人表演即将开始。

The ___ringmaster cracked his whip to announce the start of the trapeze act.

在公司的年会上，他作为主持人巧妙掌控了整个欢快的氛围。

At the company's annual party, he served as the ___ringmaster skillfully controlling the lively atmosphere.