Definition
A phrase used to wish someone good luck, particularly before a performance or presentation.
祝你好运（尤指表演前）
I heard you’re performing tonight, break a leg!
我听说你今晚要表演，祝你成功！
Before she went on stage, her friends all told her to break a leg.
在她上台前，她的朋友们都对她说「祝你成功」。
'Break a leg!' he said to his colleague who was about to give a speech.
「祝你成功！」他对即将发表演讲的同事说。