Relatedness is inevitably cultivated via human interaction. engaging with clients, getting written testimony and recommendations, staying in contact with clients afterwards.

通过与客户的人际交往，获得书面证和推荐，以及之后与客户保持联系，这种关系必然会得到维系。

We didn't believe the bank's offer of a loan until we saw it in black and white.

在我们见到书面证以前，我们不相信银行提供了贷款。

I have it here in black and white — I've got the job!

我有书面证据证，我找到作了！

The precise measurements of pyramids indicate that  highly skilled and passionate individuals worked on them. There is also written proof of skillful  construction workers and artists working on them.

金字塔的精确测量表，高技能和热情的人在他们作。还有熟练的建筑人和艺术家在其作的书面证。

I have it in writing from a judge.

我可是有来自法官的书面证。

I can't offer you anything in writing.

我没有办法出具任何书面证。

That's documented proof of your credentials.

那是你资质的书面证。