the icing on the cake
锦上添花，意味着某事物的额外的好处或令人满意的东西
口语·形容锦上添花
英文释义
an additional pleasant or desirable feature or event that enhances an already good situation
例句
Getting a bonus was great, but the extra vacation days were the icing on the cake.
典故来源
源自烘焙，蛋糕上的糖霜是额外装饰，比喻好事上再加好事。