a walk in the park
US /ə wɔk ɪn ðə pɑrk/
UK /ə wɔk ɪn ðə pɑrk/

1.
小菜一碟, 輕而易舉
something that is very easy to do
:
•
Learning to ride a bike was a walk in the park for him.
學騎自行車對他來說是小菜一碟。
•
Don't worry, this exam will be a walk in the park.
別擔心,這次考試會是小菜一碟。