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
They experience moments that happen only once in a lifetime.
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 able to attend the Olympics in person is a once-in-a-lifetime opportunity for most people.
能够亲自参加奥运会对大多数人来说是一个一生一次的机会。
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。
