英语词汇rara avis的起源、历史背景-英语词源词典

词汇	rara avis
词源	rara avis; rare bird. A rare person or thing, someone out of the ordinary, rara avis is the Latin for “a rare bird” and the ex- pression was first used figuratively by the Roman satirist Juve- nal. “A bird rarely seen on earth, and very like a black swan,” Juvenal called one of his fellow Romans (“Rara avis in terris nigroque simillima cygne”). He chose a black swan for his com- parison because black swans, native to Australia, were un- known at the time.
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英语词源词典收录了13259条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。