名詞 preconceived idea:

1. an opinion formed beforehand without adequate evidence
   同義詞：preconception, prepossession, parti pris, preconceived opinion, preconceived idea, preconceived notion

1. Tourists forget their preconceived ideas as soon as they visit our country.
   游客訪問了我國之後立刻消除了他們的先入之見。