Translation of "have your cake and eat it" - English-Traditional Chinese dictionary

have your cake and eat it

to have or do two good things at the same time that are impossible to have or do at the same time

兩者兼得
You can't have your cake and eat it - if you want more local services, you can't expect to pay less tax. 你不能二者兼得——想獲得更多的地方服務就不能指望少付稅金。

(Translation of “have your cake and eat it” from the Cambridge English-Chinese (Traditional) Dictionary © Cambridge University Press)