两全其美
have / want it both ways
(想)两全其美
to have or want to have the advantages of two different situations or ways of behaving that are impossible to combine
You can't have it both ways. If you can afford to go out all the time, you can afford to pay off some of your debts.你不可能做到两全其美。如果你有钱整天外出玩乐,就能还掉一部分债。
释义来自《牛津高阶英汉双解词典》第 9 版