Jack Of All Trades
Meaning：a person who knows a little about a lot of different subjects or activities, but not a lot about any one of them
意思：杂而不精的人，万事通。
例句：
1. Walt is good at so many things: he can fix the plumbing and wiring in his house, he fixed his roof when it leaked, he installed his washer and dryer, and he paints the house when it needs it. He’s really a jack of all trades.
Walt擅长做那么多事情：修理家里的管道和电线、修漏水的屋顶，他也会安装洗衣机和烘干机，甚至他可以自己粉刷新房子，他真是一个万事通！
2. The position in the company required someone who knew everything about a very narrow subject. They weren’t looking for a jack of all trades.
公司里的这个位置需要那种对一个学科有所专研的人，而不是一个杂而不精的人。
Tips：
①trade：本意是“行业”、“贸易”。因此all trade
②Jack：这个人名在这里是虚指某人。其他人名类似用法，还有“uncle sam”和美国的缩写都是U.S. 因此就被用来指“美国政府”；“Jane Doe”指“无名氏（女）”。
