I think that's mainly because Hollywood only ever chooses people with a very posh English accent.

我想，那主要是因为好莱坞只选那些有优雅的英式口音的人。

youdao

People tend to think that British people have posh English accents, especially compared to American English.

人们往往会想英国人有高雅的英式口音，特别是相对于美式英语而言。

youdao

Teen Talk English – learn the proper way of speaking and posh words native kids use from our experienced and enthusiastic foreign teachers. Topics cover everything that is to the teens' interests.

流行青少年口语 – 教科书之外的地道口语课程，围绕东西方青少年感兴趣的一切话题，和外教面对面感受来自异国的热情与文化的碰撞。

youdao

People tend to think that British people have posh English accents, especially compared to American English.

人们往往会想英国人有高雅的英式口音，特别是相对于美式英语而言。

优雅的英式英语 - SpeakingMax英语口语达人

I think that's mainly because Hollywood only ever chooses people with a very posh English accent.

我想，主要因为好莱坞只选那些有高傲的英式口音的人。

优雅的英式英语 - SpeakingMax英语口语达人

The Irish saw no anomaly in being represented by someone whose title had been created by Queen Victoria and who spoke posh English.

ECONOMIST: Lord Killanin

Between Bonham Carter's natural, rather posh English accent and her character's disability (which causes slurred speech), it's hard to understand her at times, so you really have to pay attention.

CNN: Review: 'The Theory of Flight' soars with emotion

He looked dapper in a dark suit and tie and proved a gracious host, speaking excellent, if not always idiomatic, English for 90 minutes in his suite at the posh Carlyle Hotel, where a lesser-known novel by Alexandre Dumas lay open on the coffee table and a stack of European films on DVD sat next to a flat-screen television.

WSJ: Maurizio Pollini: Not as Others See Him | Cultural Conversation by David Mermelstein