not miss a beat idiom informal
（尤指令人惊讶地）没有稍作停顿；一点没有迟疑
to not pause or show any uncertainty, usually when this is surprising
"That's what I thought," replied Olivia, without missing a beat.
mainly US没有一点错失
to do something without any mistakes or failures
The player hasn't missed a beat this year, scoring three touchdowns in his first three games. 这名队员今年没有一点错失，在头三场比赛中就已三次触地得分。