以下是一些含有失望的英文佳句：
1. "I was disappointed to learn that we wouldn't be able to attend the event after all."
2. "She felt discouraged after being rejected by her boyfriend."
3. "The news of the failed project left him feeling crestfallen."
4. "After a disappointing performance, he knew he needed to work harder."
5. "She was heartbroken to discover that her family couldn't make it to her graduation ceremony."
6. "I couldn't believe my eyes when I saw the state of the house after the storm."
7. "He was disheartened to find that his hard work had gone unnoticed."
8. "After a long day of work, she came home to an empty house and felt completely deflated."
9. "He was disappointed to learn that he wouldn't be promoted after all."
10. "The ending of the movie left me feeling empty and defeated."