not know a B from a buffalo

... not know a B from a battledore 一字不识 not know a B from a buffalo 一字不识 not know chalk from cheese {v.}不辨黑白 ...

buffalo是什么意思... ... Cape buffalo n. 产于南非之黑色大水牛 not know a B from a buffalo 一字不识 愚昧无知 ...