At that time I was ignorant of events going on elsewhere.
那时我并不了解其他地方发生的事情。
Never make your students feel ignorant.
千万别让你的学生感到自己一无所知。
He's ignorant about modern technology.
他对现代科技一无所知。
People don't like to ask questions for fear of appearing ignorant
人们不喜欢问问题，害怕自己会显得很无知。
I met some very ignorant people who called me all kinds of names.
我碰到了一些非常粗鲁的家伙，他们用各种脏话骂我。