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

　　那時(shí)我并不了解其他地方發(fā)生的事情。

　　Never make your students feel ignorant.

　　千萬(wàn)別讓你的學(xué)生感到自己一無(wú)所知。

　　He's ignorant about modern technology.

　　他對現代科技一無(wú)所知。

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

　　人們不喜歡問(wèn)問(wèn)題，害怕自己會(huì )顯得很無(wú)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(huà)罵我。