我们认为有必要签订一份书面协议。

We recognize the necessity for a written agreement.

《牛津词典》

他们签署了一份保守机密的协议。

They signed a confidentiality agreement.

《牛津词典》

此协议自一开始就被宣布无效。

The agreement was declared void ab initio.

《牛津词典》

Suppose they have a written contract, or even an unwritten contract, what enforces the contract for colluding firms or crooks in jail?

假如他们签了一份书面协议,或干脆口头的,他们怎么强制履行呢

耶鲁公开课 - 博弈论课程节选

When you create a corporation, you write up a contract, which specifies the rules of the corporation; it's like a constitution for the corporation.

创建公司时,你会起草一份协议,其中规定了公司的条款,就像公司的宪法一样

耶鲁公开课 - 金融市场课程节选

I did consider this sort of noble work because I think companies should honor their agreements.

我的确认为这算是一种高尚的工作,因为我认为公司应该履行它们的协议。

耶鲁公开课 - 金融市场课程节选