It's a piece of cake.
小菜一碟啦。

Scene
Laura: Are you sure you can pass the MBA exam?
Alile: Absolutely. It's a piece of cake.

Notes
呵呵， 你是否也把這句話理解為“這是一塊蛋糕”呢？ 其實從對話情景來看就可以猜出它并不是在講蛋糕。其真正意思是“小事一樁，輕而易舉的事情”。^_^

Exercises
現(xiàn)在來看看這個句子怎么說：
我覺得學英語對Steven來說簡直是小菜一碟。