"On the grass next to a pond, the mother duck's eggs were hatching. The ducklings began to hatch and came out one by one. Only one big egg had not moved or made a sound."

池塘边草地上，鸭妈妈正在孵蛋。小鸭子们依次破壳而出，只有一颗大蛋毫无动静。

"When the Ugly Duckling went to the pond to swim, the frog said: 'Ribbit! Ribbit! I do not like you, go away!'

丑小鸭到池塘游泳时，青蛙说：“呱呱!我不喜欢你，快走开!”

"The Ugly Duckling was always alone because its siblings didn't want to play with it."

丑小鸭总是孤零零的，因为兄弟姐妹都不愿与它玩耍。

"It walked through the forest, crossed the stream, and met all kinds of animals, but they all thought the Ugly Duckling was not good-looking."

丑小鸭穿过森林、小溪，遇到各种动物，但都被认为不好看。

"Winter came, and the Ugly Duckling coldly shivered on the ice."

冬天来临，丑小鸭在冰面上瑟瑟发抖。

"The Ugly Duckling's story teaches us that everyone has their own unique place in the world."

丑小鸭的故事告诉我们，每个人都有自己独特的存在价值。

"Remember: If you don't believe in yourself, who will？"

提醒自己：如果你都不相信自己，还有谁会呢？

"Stop worrying so much. Worry will not strip tomorrow of its burdens, it will strip today of its joy."

别过度担忧，担忧会消耗今天的快乐。

"Finally, the Ugly Duckling realized that being different is not a curse but a gift."

最终，丑小鸭明白与众不同并非诅咒，而是天赋。

"He spread his wings to the sky and found himself among the beautiful swans."

他展开翅膀飞向天空，竟发现自己与天鹅同类。

这些句子覆盖了故事的关键情节与主题，适合作为英语学习素材。