The icing on the cake 锦上添花
The traditional fruit cake served at Prince William and Kate Middleton's wedding reception to 300 people was made up of 17 individual cakes, eight tiers high, and it was decorated with around 900 sugar-paste flowers.
短语 the icing on the cake “蛋糕上的糖衣”的意思是使一件原本己经很好的事物变得更好，锦上添花。
It is great to see my team in the final. And now I've got tickets to watch the match in the stadium - this is the icing on the cake!
Mary's salary will double with her promotion. All the foreign travel and luxury hotels she'll be staying in are the icing on the cake.
我们用短语 a piece of cake “一块蛋糕”来形容易如反掌的、轻松的事，正如汉语里说的“小菜一碟”。
I am very good at Maths. The final exam will be a piece of cake.