How does the fourth estate simultaneously serve an audience that is both consumer and citizen?

新闻界何以同时服务于消费者和公民？

《柯林斯英汉双解大词典》

The news is not just a product; the press is the fourth estate, a pillar of the polity.

新闻不是一件产品；新闻产业作为社会的第四阶层，是国家政体的支柱。

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So far, this fit of activity looks unlikely to save many of them. Even if it does, it bodes ill for the public role of the Fourth Estate.

迄今为止，这些措施似乎不可能拯救大多数报纸，即使能见成效，也预示着报纸作为第四等级新闻媒体公共角色的丧失。

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Members of the Fourth Estate and devotees of the First Amendment, take a bow.

NPR: How Best To Charm GOP? Palin Bashes Press

As it happens, some of that mud has come from the get-Gonzales faction of the Fourth Estate.

CNN: Navarrette: Will Gonzales get a fair hearing?

And whereas health officials may have learnt from their experiences, she is less sure about the fourth estate.

ECONOMIST: The long-lasting consequences of a health scare