A piece of cake.美国俚语意思

A piece of cake.美国俚语意思 a piece of cake A piece of cake a piece of cake a piece of cake 麻烦大家给一些英语俚语我,如a piece of cake(轻松的事). 求英语中的俗语或俚语（越多越好）,e.g:A piece of cake Just a piece of cake! a piece of cake啥意思 It's a piece of cake a piece of cake啥意思 A piece of cake意思是? a piece of cake就是小菜一碟? a piece of cake=easy吗? he wants to have【】A.a piece of big cake B.a big piece of cake C.a piece big cake D.a big piece cake a piece of 哪些比如a piece of paper a piece of cake he wants to have【】A.a piece of big cake B.piece of paper C.piece big cake D.a big piece cake it's a piece of cake是啥意思?