"夢寐以求"的英文表達可以是 "long-cherished dream" 或 "dream come true"。這兩個短語都可以用來形容一個人長久以來渴望實現的事情或夢想。例如，"Winning the championship was his long-cherished dream" 或 "Getting accepted into that university was a dream come true for her"。