They had made a verbal agreement to sell.

他们达成了口头售货协定。

Verbal agreement can be binding.

口头协议也有约束力。

Sign verbal agreement.

签订口头协议。

I wrote a memorandum to confirm our verbal agreement.

我写了份备忘录以确认我们的口头协议。

Verbal agreement between two parties who trust each other.

互相信任的双方当事人之间的口头协议。