have your cake and eat it (too)
US /hæv jʊər keɪk ænd iːt ɪt tuː/
UK /hæv jʊər keɪk ænd iːt ɪt tuː/
1.
魚與熊掌兼得, 想兩全其美
to want or try to do two things that are impossible to do at the same time
:
•
You can't have your cake and eat it too; you need to choose between your career and your hobby.
你不能魚與熊掌兼得；你需要選擇你的事業和愛好。
•
She wants to work full-time and also travel the world, but she can't have her cake and eat it too.
她想全職工作，也想環遊世界，但她不能魚與熊掌兼得。