来自《耶鲁大学开放课程：博弈论第1集第1集》

What about you with your roommates?

那你和你室友是不是可以签协议
How many of you have a written contract,

有人写过协议吗
stuck with a magnet on the fridge,

在冰箱上贴个磁力贴
telling you when you're supposed to tidy up.

规定好什么时候该谁打扫房间
Very few of you.

几乎没有吧
Why do you manage to get some cooperation

为什么即便没有书面合同
between you and your roommates even without a written contract?

你一样可以和你室友合作得愉快
It's not legally enforceable.

它不具有法律强制性
Well it probably is legally enforceable actually.

事实上它具有法律强制性
This guy says not, but it probably is legally enforceable.

这个男生说没有但它确实有
He probably could have a written contract about tidying up.

你们可以写个书面协议
The woman in here.

请那位女士回答