I don't profess to be an expert in this subject.

我不敢自诩为这方面的专家。

《牛津词典》

Each of the authors of the tapes is an expert in his field.

这些磁带的每一位作者都是其领域内的专家。

《柯林斯英汉双解大词典》

He claims to be an expert in astronomy.

他声称自己是天文学专家。

youdao

University of Pennsylvania professor Arthur Caplan is bioethicist -- an expert in ethical and moral issues of biological medicine and technology.

VOA: special.2010.07.20

But in terms of reality, he's no more an expert in this than you are, or than anybody is.

但是就现实来说，他不如你们这般专业，他也不如其他任何人。

麻省理工公开课 - 电影哲学课程节选

As an expert in teaching, could you give us some advice on how best to study a language?

作为一名教育专家，关于怎样才是学习语言的最佳方式，你能给我们一些建议吗？

要继续努力 - SpeakingMax英语口语达人

Often, bad pay policy reflects bad management, says Peter Montagnon, an expert in corporate governance.

ECONOMIST: Big shareholders must get stuck in to make capitalism work

Do they have articles published or are quoted in articles as an expert in their field?

FORBES: Tips For Choosing A Career Coach (Or Pageant Coach)

He used to travel extensively through the Burren as an expert in botany and in landscapes.

BBC: Did Gollum get his name from a cave in the Irish Burren?