A friend might tell you that his new job was"a piece of cake.
西方饮食文化中,像蛋糕这样的甜点是必不可少的，吃一块蛋糕简直太容易了。
因此,就有了“a piece of cake”这句俚语，形容事情很简单。

Uncle: Have you passed TOEFL?
你通过托福考试了吗？
Rose: No, I haven't taken it yet. I think it is too hard for me.
没有,我还没有参加过。我来说太难了。
Uncle: You should have confidene. It is just a piece of cake for you
你应该有信心才对。托福对你来说直是小菜一碟。
Rose: Why do you say so?
为什么这么说?
Uncle: I have passed it, and your English is much better than mine
我都通过了,你的英语水平比我好多了。
Rose: OK, I'll try.
好吧,我试试。