special knowledge
特別な知識、専門知識
/suto3/google.iconspecial knowledge
/suto3/Google画像検索.iconspecial knowledge
/suto3/Google定義検索.icon special knowledge
/suto3/wikipedia.iconspecial knowledge
/suto3/weblio.icon special knowledge
/suto3/kotobank.icon special knowledge
/suto3/jisho.icon special knowledge