expert knowledge
専門知識、専門的知識
/suto3/google.iconexpert knowledge
/suto3/Google画像検索.iconexpert knowledge
/suto3/Google定義検索.icon expert knowledge
/suto3/wikipedia.iconexpert knowledge
/suto3/weblio.icon expert knowledge
/suto3/kotobank.icon expert knowledge
/suto3/jisho.icon expert knowledge