The saying, “A jack of all trades is master of none, ” is for them.

“，松。”这句俗语指的就是他们。

There are no jack of all trades here.

这里不需要松的。

Not just his personal jack of all trades, but his best friend.

老父亲不仅仅是他私人业务上的多面手，也是他最好的朋友。

He was a jack of all trades who did philosophy and science.

他是从事哲学和科学工作的多面手。

Those who diversify too much run the risk of being a jack of all trades and master of none.

那过于多元化的人冒着成为万事却一无是处的风险。

It is critical that students avoid becoming a " jack of all trades and a master of none " .

从上述的讨论中可以很明显地看出选修课能够给学生带来许多的好处。但是如让学生选过多的选修课，尤其是过多地选修本专业以外的课程，也会对学生产生不利的影响。比如一个工程学专业的学生完成了很多社会学和人类学的课程，而本专业的课程只选了二三门，这就很可能造成他的专业技能不精，也无法胜任研究生课程的学习。学生要避免成为涉猎众多却没专长的毕业生这也是至关重要的。

So, if you have too much diversity in your skill set, you may be a jack of all trades but master of none.

所以，如你的技能组合过于多化，你可能是万事， 但一无是处。

The expression " a jack of all trades and master of none" is an old expression to refer to people who are able to do many things a little bit.

“万事，万事”是一句古语，指的是一点点就能做很多事情的人。

If, for example, you want to be a jack of all trades and be very well rounded then probably you’re going to want to nurture the intelligences which aren’t that strong.

例如，如你想成为所有行业的杰作并且非常全面， 那么你可能会想要培养不那么强大的智力。

This is a criticism – a negative statement about someone – if you say " She is a jack of all trades and master of none." " Trades, " here, simply means different skills.

这是一种批评——对某人的负面评价——如你说“她是万事，一无是处”。“交易”在这里只是指不同的技能。