我们按私下协议出售房屋。

We sold the house by private treaty.

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近期一家试图通过私下协议倒闭的深圳制造商认为这个过程几乎是难以忍受的。

Shenzhen manufacturer who recently tried to close by informal agreement describes the process as almost impossible.

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但是同时，莫斯科与吉尔吉斯斯坦上个月却私下签订协议，而且这一协议很可能导致美在中亚地区主要军事基地关闭撤离。

At the same time, however, Moscow agreed a backroom deal last month with Kyrgyzstan which is likely to lead to the closure of the US's key military base in central Asia.

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So it's going to be pretty difficult for us to sustain this joint monopoly output, this collusive agreement.

因此说想要通过私下协议来,维持垄断产量,是非常困难的

耶鲁公开课 - 博弈论课程节选

So there are various reasons why it's hard to maintain this collusive agreement.

这样的私下协议难以维系,是有多方面原因的

耶鲁公开课 - 博弈论课程节选