It's the fact you're getting this extra benefit

但是现实是在你和他人合作中
from working with someone else

你会获得额外的收益
that makes it worth while working as a team to start with.

这样合作才有价值
Is that right?

我说得没错吧
So we can think of this term has to do with complementarity, or synergy,

因此我们可以把合作理解为互补或协同
a very unpopular word these days but still: synergy.

虽然协同这个词现在不是很常用了
So we're gonna assume that when you work together there're some synergies.

所以我们假设合作中就要有协同
Some of you are good at some parts of the homework,

有人擅长作业里的一部分内容
some of them are good at other parts of the homework.

别人擅长另外一部分内容
And so in this law firm,

律师事务所也是一样的
one of these guys is an expert on intellectual property

有人是知识产权达人
and the other one on fraud or something.

别人可能处理欺诈案件很有经验