ugly duckling

US /ˈʌɡ.li ˈdʌk.lɪŋ/
UK /ˈʌɡ.li ˈdʌk.lɪŋ/
"ugly duckling" picture
1.

丑小鸭

a person or thing that is initially unattractive or unpromising but eventually becomes beautiful or successful

:
She was an ugly duckling in high school, but she grew up to be a stunning model.
她高中时是个丑小鸭,但长大后成了一位惊艳的模特。
The old building was considered an ugly duckling, but after renovation, it became the most beautiful one in the city.
那座旧建筑曾被认为是丑小鸭,但翻新后,它成为了城市中最美丽的建筑。