once-in-a-lifetime英'wʌns'ɪn'eɪl'aɪftaɪm美'wʌns'ɪn'eɪl'aɪftaɪmCOCA³⁴⁷⁹⁸BNC⁵⁸²²⁵iWeb²¹⁴⁵¹ 基本例句 adj.千载难逢的¹⁰⁰ Here was a once-in-a-lifetime opportunity to give the regions of Marilyn fans worldwide a rarely seen portrait of their idol. 这可是给了世界各地玛丽莲?梦露的粉丝一个看到偶像生活照的绝佳的机会啊。 news.china.com.cn