Why do you know such a difficult word but not an easy one like this?
"何でそんな難しい単語知っててこんな簡単な単語知らないの？"
- Why do you know such a difficult word but not an easy one like this?
- How do you know a difficult word like that but not an easy one like this?
- How do you know a hard word like XXX but not an easy one like XXX?
XXX -> 単語を入れる
アメリカ合衆国 
