一言为定

yī yán wéi dìng chéng běn wǒ men fēn tān

一言为定，成本我们分摊。

That's a deal. We'll divide the cost.

wǒ men yī yán wéi dìng

我们一言为定。

We have both agreed to this.

jūn zǐ yī yán wéi dìng

君子一言为定

a gentleman's word is his bond

jiù zhè yàng bàn yī yán wéi dìng

就这样办，一言为定。

That's the way to do it. It's settled then.

nà jiù chéng jiāo le yī yán wéi dìng

那就成交了，一言为定。

It's a deal.

yī yán wéi dìng wǒ jué bù fǎn huǐ

一言为定，我绝不反悔。

I give you my word and I'll never go back on it.