not know a B from a buffalo

• 一字不识,愚昧无知

not know a B from a buffalo的用法和样例：

例句

1. She is an awful fool of a woman.
   她是一个非常愚昧无知的女人。
2. The benighted Chechens were not the only victims of the amorality.
   愚昧无知的车臣人并非是唯一的是非不分的牺牲者。