He is said to be expert in English speech.

据说，他擅长用英语作演说。

youdao

Be expert in...

在…方面是专家。

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》

Independent Russian military expert Alexander Golts says the situation suggests that security in the North Caucasus cannot be tightened further.

VOA: special.2010.04.03

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

Pop culture expert Robert Thompson says the changes could be seen in film and television as well.

VOA: special.2009.05.04

While you may very well be an expert in your field, who knows this to be the case?

FORBES: How to Super-Charge Your Accounting Practice

The benefits include the fact that big financial firms should be more expert in managing assets, and the running costs should be lower because they manage such large amounts of money.

BBC: Mundo | Aprenda ingl��s | Manejo de fondo de pensiones

In addition to his expertise in bomb-making, Mr Asiri is also said to be an expert in preparing poisons and well-versed in martial arts.

BBC: Profile: Al-Qaeda 'bomb maker' Ibrahim al-Asiri