It's our first cooperation, so please show us your sincerity.

这是我们的首次合作，请表示贵方的诚意。

youdao

First of all, we would like to say that it is really a pleasure to see the cooperating sincerity from your side, and please accept our great thanks for that.

首先我们乐见贵公司在本项目上表现出的合作诚意，并对此表示感谢。

youdao

Sincerity is also the first step in communicating with others.

真诚也是与人沟通的第一步。

youdao

Mr Mubarak must seek to draw the Brothers openly into the parliamentary and perhaps even ministerial fold, and test their sincerity, at first by giving them a chance to run local councils.

ECONOMIST: Arab autocracy