演出期间请勿交谈。
Please ___refrain from talking during the performance.
成功的领导者往往避免不必要地行使权威。
Successful leaders often ___refrain from exerting authority unnecessarily.
她不得不忍住不笑那个不合时宜的笑话。
She had to ___refrain from laughing at the inappropriate joke.