An anonymous caller told police what had happened.

一个打匿名电话的人告知了警方所发生的一切。

《柯林斯英汉双解大词典》

An anonymous benefactor stepped in to provide the prize money.

一位匿名捐助人参与进来提供了奖金。

《柯林斯英汉双解大词典》

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So hopefully, you can picture yourself at this age in a similar situation with an anonymous friend and think this is something, kind of observations maybe you can make as well.

所以你们可以想象你们在这个年纪,在与这类似的情况下和某个朋友思考着什么，也许你们也能发现什么。

麻省理工公开课 - 化学原理课程节选

In a particularly vicious critique of so-called Smectymnuus, an anonymous Anglican opponent attacked not only these six Presbyterian ministers but attacked Milton as well.

在对所谓的Smectymnuus的特别恶毒批评中，一个匿名的圣公会反对者,不仅对6个长老部长进行了抨击，也抨击了弥尔顿。

耶鲁公开课 - 弥尔顿课程节选

There's an organization called Gambler's Anonymous, which is like Alcoholic's Anonymous.

有个叫匿名戒赌协会的组织,就好像匿名戒酒协会一样

耶鲁公开课 - 金融市场课程节选

The museum bought the letters from an anonymous private collector via Sotheby's in New York.

BBC: A new book of Van Gogh's letters is to be published in 2008-9

The diamond was sold to an anonymous bidder by the Christie's auction house in Geneva.

BBC: 'Perfect' Archduke Joseph diamond sells for $21m

John O'Dowd said he was concerned the test was being paid for by an anonymous donor.

BBC: John O'Dowd calls for exam donor to be named