stumble ·verb (PAUSE)
Definition: to make a mistake, such as pausing or repeating a word, while speaking or performing Level: C2
即使经验丰富的演员在巨大压力下也可能在台词上出错。
Even experienced actors can ___stumble on their lines when under immense pressure.
那位紧张的候选人在他重要的演讲中开始结巴了。
The nervous candidate began to ___stumble during his important presentation.
那位政治家试图即兴发挥，结果造成了尴尬的言语失误，暴露出他准备不足。
The politician's attempt to ad-lib resulted in an awkward ___stumble, revealing his lack of preparation.