她想回答好老师的问题，可她答非所问。

She tried to answer the teacher's question, but she was way out in left field.

youdao

她想回答好老师的问题，可她 答非所问 。

This is what I think although not quite an answer to your question.

youdao

但这是答非所问。

But this is a simple answer to the wrong question.

youdao

母亲说：这是答非所问（或直译：一个无谓的回答）。

The queen said that was but an idle answer.

youdao

母亲说：这是答非所问（或直译：一个无谓的回答）。

The queen said that was but an idle answer.

youdao