1·All jazz lovers should come to the Montreal International Jazz Festival at least once in a lifetime.
所有的爵士爱好者一生中都应该至少来一次蒙特利尔国际爵士音乐节。
2·An opportunity like this comes once in a lifetime.
像这样的机会一生也许只会遇到一次。
—— 《牛津词典》
3·This "once in a lifetime" event actually may take place twice in some folks' lives.
这种“生平仅见”的事件实际上有可能在一些人的生活中发生两次。
4·This opportunity comes once in a lifetime.
这个机会一生只有一次。
5·This opportunity comes once in a lifetime, yo.
这个机会在你一生中只会出现一次。
6·This kind of certainty comes once in a lifetime.
译：这样确切的爱，一生只有一次。
7·This kind of certainty comes but once in a lifetime.
这样确定无疑的爱，一生只有一次。
8·Only once in a lifetime that a special dream comes true.
一生中只有一次美梦实现的奇迹。
9·Carl: You can't pass up this job.This kind of opportunity comes only once in a lifetime.
卡尔：你不可错过这个工作。这种机会一辈子才有一次。
10·ROBERT: I'll say this once. I never said it before. This kind of certainty comes just once in a lifetime.
罗伯特：我只想声明一次，我以前从来没有这样说过。像这样肯定的事一生中只能出现一次。