I've gone blank

We use this expression to say that we can't remember a piece of information or can't decide what to write or say in a situation.

我们用这个表达表示一种连一条信息都记不住，无法决定该写什么或说什么的状态。

A: Why have you stopped writing?

你为什么停下不写了?

B: I'm sorry, I've gone blank.

抱歉，我脑子一片空白。