“the blind leading the blind”直译为“盲人引导盲人” ，引申为外行人指导外行人。

【例句】
It was the blind leading the blind.
这完全是外行教外行。

This might seem like the blind leading the blind-and it's hard to imagine parents at an open day being impressed by a university offering zero contact hours.
这看起来就像外行指导外行一样，很难想象父母们会在校园开放日，对一所提供零面授课时的大学留下深刻印象。