0 someone or something that is ugly and not successful when young or new but will later become beautiful or successful -- 丑小鸭（年少或刚问世时难看平庸、日后变得漂亮或出众的人或物）
These are the ugly ducklings.
Finally, and perhaps most importantly, transport, despite its vast overall cost to the nation, has long been regarded as a sort of ugly duckling.
The tale of the ugly duckling (or the coming of age of second language acquisition research).
She also muses about playing the ugly duckling as a child, being forced into the role without even the satisfaction of emerging as a beautiful swan at the end.
A recent and novel method of melanoma detection is the ugly duckling sign.
I am not sure whether it makes the arrangement for limitation change from an ugly duckling into a swan, but there is certainly some improvement.
Sympatric speciation in animals : the ugly duckling grows up.
Twins felt that they become the ugly duckling as separated individuals.
