At that time I was ignorant of events going on elsewhere.

　　那時我并不了解其他地方發生的事情。

　　Never make your students feel ignorant.

　　千萬別讓你的學生感到自己一無所知。

　　He's ignorant about modern technology.

　　他對現代科技一無所知。

　　People don't like to ask questions for fear of appearing ignorant

　　人們不喜歡問問題，害怕自己會顯得很無知。

　　I met some very ignorant people who called me all kinds of names.

　　我碰到了一些非常粗魯的家伙，他們用各種臟話罵我。