I know your name, although we have never been introduced.

我知道你的名字，尽管我们从未被介绍过。

youdao

He's really been a wonderful teacher to me although we have never met.

虽然我和他从未谋面，但是对我来说，他真的是一位出色的老师。

youdao

We have been in communication with each other by letter for more than two years although we have never seen each other.

虽然我们彼此从来没见过面，但我们通信联系已有二年多了。

youdao

Before going on, I should point out, in the interests of full disclosure, that we share a publisher - although I have never met David Hicks, nor read his book.

BBC: Should David Hicks have been applauded?