释义
a person who can do many different types of work but who is not necessarily very competent at any of them
杂而不精的人，三脚猫；万能博士，万金油。
双语例句
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Jack has become Jack of all trades and master of none.
杰克成了个万事皆通而一无所长的人。
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Q. Druids were always a "jack of all trades, but master of none" and usually mocked when specializing. Will new talents change this?
问：D总是“博而不精”，想要专精的时候却又总是被耍。新天赋会改变吗？
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In general, the professional is an expert, whereas the manager is a jack-of-all-trades and master of none—the antithesis of the professional.
大体来说，专业人员是专家，而经理人是万事通，杂而不精——与专业人员正好相反。
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Those who diversify too much run the risk of being a jack of all trades and master of none.
那些学太多技能的人有可能最后什么也不会。