he didn't know his ass from his elbow

来源：百度知道 编辑：UC知道 时间：2024/06/03 21:37:49
翻译 应该不是表面的意思吧?

是"他什么也不知道/什么也不会/很傻"的意思

e.g.
It took him all day to fix the TV, but the picture is still very poor. I don't think he knows his ass from his elbow.

他不知道他的屁股从他的胳膊肘。
应该不是按照表面的意思。