Como eu digo "em certos meios" em inglês

Português: em certos meios/ círculos, em alguns setores, em algumas áreas/ regiões.
Inglês: in some quarters/ circles, in certain sectors/ areas/ regions.

Exemplo 1: (...) warns that an imminent imposition of a levy would coincide with signs that demand for study in the UK is already softening in some quarters (...) Ref. monitor.icef

Exemplo 2: (...) giving an indication of how well known this childminder from Northampton is in some circles. Ref. theguardian

Exemplo 3: It pointed towards a “steady” jobs market in certain sectors, such as engineering, but flagged a continued drop in hiring in retail and hospitality. Ref. uk.finance.yahoo

Exemplo 4: It was extremely important for them to be talking face to face, and from that give their respective officials instructions about how they want to see progress in certain areas made by the end of this year, Goodale said. Ref. globalnews

Exemplo 5: (...) the Italian Society for Emergency Medicine said emergency room admissions rose by up to 20 per cent in certain regions during peak temperatures this year (...) Ref. independent.co

OBS.: Aproveitando o tema deste tópico, segue uma opção de dizer ao contrário do que alguns sugerem: contrary to suggestions in some quarters.

Exemplo 6: Contrary to suggestions in some quarters, this is not the result of the fiscal rules or the OBR – though there are legitimate gripes about how our fiscal framework is designed and operated. Ref. observer.co

Cf. Como dizer "Ao contrário do que muitos pensam" em inglês