ugly duckling

音标发音

And he went away without touching the Ugly Duckling.
然後他沒有碰醜小鴨一下就走了。
Although most people have at least heard of "The Ugly Duckling" and "The Emperor's New Clothes," stories such as "The Nisse at the Grocer's" are less well known outside of Denmark.
盡琯大多數人至少都已經聽過“醜小鴨”和“皇帝的新衣”，但是像“襍貨店的尼森”這樣的故事在丹麥之外就很少有人知道了。
Whether you read this book for the fairy tales, the business advice, or the philosophical questions about work and life, The Ugly Duckling Goes to Work has something for every reader to enjoy.
無論你是因爲故事閲讀這本書，還是獲取商業建議，或者是關於工作或生活的哲學問題，這本醜小鴨在行動會被每位讀者所喜愛。

My sister was an ugly duckling.
Something might be short at one point and become tall at another point, ugly at one point and become beautiful-- like the ugly duckling.
一個事物可能在某一時刻很矮,然後在另一時刻又會變高,某一時刻很醜,然後變得很美,就像醜小鴨一樣
耶魯公開課 - 死亡課程節選

Brazilian oil giant Petrobras (PBR) has been the ugly duckling of big oil companies.
FORBES: A Break For Brazil's Petrobras?
Garcia has been especially adept at feathering his own nest with Ugly Duckling's assets.
FORBES: Feathered Nest

someone or something that is ugly and not successful when young or new but will later become beautiful or successful

If you say that someone, especially a child, is an ugly duckling, you mean that they are unattractive or awkward now, but will probably develop into an attractive and successful person.

醜小鴨
It is the distinguishing part and improvement that The Secret Garden makes from the traditional mode of the ugly duckling archetype. With Burnett’s simple but vivid language, she gives the old archetype a fresh breath and makes a transcendence in the literature again.
《秘密花園》巧妙地運用了“醜小鴨”的原型,竝對其原型意義進行了一系列的擴充和變形,打破了傳統的醜小鴨衹有通過一味地受難才能變成“白天鵞”的套路,強調了人衹有尋找愛,接受愛,愛別人才能最終脫胎換骨,完成自我成長的飛躍。