Anonymous means we don't know who wrote it.

匿名的意思是我们不知道是谁写的。

youdao

Who is--who wrote it though if Paul didn't?

谁…如果不是保罗那么是谁写的？

youdao

Who wrote it?

谁写的报告？

youdao

That means the song is so old, no one really knows who wrote it.

VOA: special.2009.07.27

You didn't know who wrote it, where, when, how, why, and someone says to you, "I want you to draw some conclusions about that piece of writing.

你不知道是谁，在哪里，什么时间，怎么样，为什么要写,然后你被要求对篇文章，做一个总结。

耶鲁公开课 - 旧约导论课程节选

Anonymous means we don't know who wrote it.

匿名的意思是我们不知道是谁写的。

耶鲁公开课 - 新约课程节选

How did the officer who wrote it know what was in the police log?

BBC: Why the Andrew Mitchell 'plebgate' story matters

He steadfastly refused to criticise Labour's 2010 general election manifesto, in stark contrast to Ed, who wrote it.

BBC: The David Miliband Story

Apparently the sixth-century scribes who wrote it were living in what was then Judea, somewhere in present-day Israel.

FORBES: On The Block