once in a lifetime
01
used for referring to a very special opportunity that most likely will not be offered more than once to someone
Idiom
例子
He feels that this chance only comes once in a lifetime.
once-in-a-lifetime
01
一生一次的, 独特的
extremely rare or unique and is not likely to be repeated or experienced again in one's lifetime
例子
Being part of the Commonwealth Games has been a once in a lifetime experience.
成为英联邦运动会的一部分是一次一生难得的经历。
