A jack of all trades is master of none.
样样通,样样松。/博艺即无艺。
Some people can do many things, but are not experts at any one of them. The saying, “A jack of all trades is master of none,” is for them. In fact, it is far better to concentrate on one thing and learn to master it than to know only a little about everything.
有些人能做许多事但事事却不专精。“样样通,样样松。”这句俗语指的就是他们。事实上,专注一件事并加以学精要比什么都懂一点强多了。