He is said to be expert in English speech.

据说，他擅长用英语作演说。

youdao

For example, individuals need to be expert in their specialty areas to move up. That tends to preclude branching off into other areas of the community.

例如，在某专业领域成为专家的人也需要不断改进，需要排除异心与智囊团的其他部门协作。

youdao

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》

I'll end by telling you that there's a lot of stuff that we'll be talking about, that I want to talk about, that I am not expert in.

最后还要告诉你们,我们还会讲到很多其它的内容,是一些我会讲到的东西,但我并不是那些方面的专家

耶鲁公开课 - 心理学导论课程节选

He is, really, a bit of all three, but one thing is certain: Walking among his sleek, dynamic models interspersed throughout the warehouse-like first floor of the Marlborough, you don't have to be an expert in physics to recognize their artistry.

FORBES: Magazine Article

"I happen to be an expert in protein structure and how viruses enter cells and how to stop that, " Kim says.

FORBES: Peter Kim To Head Merck's Labs

Here offerings include a tour of Chicago sites made famous in film, a private architectural boat tour, cooking classes, or the latest, a customized private tour of the famed Art Institute of Chicago, customized in the sense that the hotel will arrange for your guide to be an expert in the area of art that interests you.

FORBES: Peninsula Chicago: Celebrating 10 Luxurious Years With Deals & Meals