Definition
This idiom describes someone with a wide range of skills and knowledge but lacks expertise in any particular area.
博而不精
He can play guitar, paint, and code, but he's not really an expert in any of them; he's a jack-of-all-trades, master of none.
他會彈吉他、畫畫和寫程式，但這些都不是他的專長；他是個樣樣通、樣樣鬆的人。
Although she has tried various careers and has worked in many different fields, she hasn't become an expert in any of them, she is a jack-of-all-trades, master of none.
雖然她嘗試過各種職業，也曾在許多不同領域工作，但她在任何一個領域都沒有成為專家，她是個樣樣通、樣樣鬆的人。
This company needs specialists, not a jack-of-all-trades, master of none.
這家公司需要專家，而不是樣樣通、樣樣鬆的人。