To my disappointment, my father doesn't agree to buy me a new bike.
我父亲不同意给我买新脚踏车，我很失望。
After months of disappointment, his perseverance was finally rewarded.
数月来他经历挫折而不断努力，终於有了收获。
She gestured her disappointment by laying her hand on her forehead.
她把手放在额头上，以表示失望。
