| 词汇 | once-in-a-lifetime |
| 释义 | once-in-a-lifetime 主要翻译 once-in-a-lifetime adj (opportunity: very rare) (机遇等)一生一次的，千载难逢的The brothers thought the trip around the world was a once-in-a-lifetime opportunity. 复合形式： once in a lifetime adv (extremely rarely) (机遇等)一生一次，千载难逢A chance like this only comes along once in a lifetime. |
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