a piece of cake.
轻松的事,小菜一碟,小事一桩,轻而易举的事。
放轻松!学习一种新的语言对你来说就是小菜一碟。
Relax! Learning a new language is a piece of cake for you.
他学习能力很强,这个工作对他来说轻而易举。
He is a fast learner. This job is a piece of cake for him.
别紧张,这门考试对你来就是小菜一碟。
Take it easy. This exam is really a piece of cake for you.