鱼 yu2 魚
与 yu3 與
熊 xiong2 熊
掌 zhang3 掌
  1. lit. the fish and the bear's paw, you can't have both at the same time (idiom, from Mencius); fig. you must choose one or the other
  2. you can't always get everything you want
  3. you can't have your cake and eat it

Examples

鱼与熊掌不可兼得。

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