One that is considered ugly or unpromising at first but has the potential of becoming beautiful or admirable in maturity.丑小鸭:起初被以为丑陋的没有前途,但成熟后变得美丽或值得赞美的人
Etymology语源
After The Ugly Duckling , a story by Hans Christian Andersen 源自 The Ugly Duckling ,汉斯·克里斯丁·安徒生所写的一个故事