He is an innovator in this field.

他是这个领域的革新者。

《柯林斯英汉双解大词典》

They are all expert in this field.

他们都是这个领域的行家。

《牛津词典》

Researchers in this field have made some important new discoveries.

这个领域的研究人员有了一些重大的新发现。

《牛津词典》

We and my many colleagues in this field are very proud to say that we have helped to prove Heir Himmler quite correct."

VOA: standard.2010.07.26

And so yes, the signal that this field of discursivity is on the table is introduced by the name of the author but it remains just a name.

所以的确，这种公开的散漫性的信号,就通过作者的名字被介绍出来，而且也仅仅只是个名字。

耶鲁公开课 - 文学理论导论课程节选

and so there are some products where... at least, as far as, I don't know this field very well,

所以有的产品……至少，我对这个领域不是很了解，

广告和价格的关系 - SpeakingMax英语口语达人

Thus the EU decided to appoint a trustee to check compliance in this field.

FORBES: EU's Kroes Names Scientist To Track Microsoft

And the settlement will create a huge barrier for any new entrants in this field.

NEWYORKER: Google��s Moon Shot

Any impact I'll be able to make on the human race will be in this field.

CNN: Why the other Fashion Weeks matter