詞彙 "not know B from a battledore" 在中文的含義

"not know B from a battledore" 在英語中是什麼意思?與 Lingoland 一起探索這個詞的含義、發音及具體用法

not know B from a battledore

US /nɑːt noʊ biː frʌm ə ˈbæt.əl.dɔːr/
UK /nɒt nəʊ biː frəm ə ˈbæt.əl.dɔːr/
"not know B from a battledore" picture

成語

一竅不通, 目不識丁

to be completely ignorant or illiterate; to not know even the simplest things

範例:
He claims to be an expert, but he does not know B from a battledore.
他自稱是專家,其實他連最基本的常識都沒有
How can she manage the project when she does not know B from a battledore about finance?
她對財務一竅不通,怎麼能管理這個項目呢?