To say I'm disappointed is an understatement.

　　說(shuō)我很失望是很輕的說(shuō)法。

　　The players were jeered by disappointed fans.

　　球員受到大失所望的球迷奚落。

　　I was disappointed by the quality of the wine.

　　這酒的質(zhì)量令我失望。