Definition
This idiom is used to express that it is very unlikely that someone will get what they want, often with a hint of sarcasm.
（用于告知某人其愿望几乎不可能实现）但愿你好运！
"He hopes to get first place in the competition." "You should be so lucky!"
「他希望在比赛中获得第一名。」「但愿你好运！」
"She thinks she can pass the exam easily." "You should be so lucky!"
「她认为她能轻松通过考试。」「但愿你好运！」
"They plan to start a successful business without any experience." "You should be so lucky!"
「他们计划在没有任何经验的情况下开一家成功的公司。」「但愿你好运！」