The intensely critical spirit is often the narrow-minded and ignorant one.
極愛吹毛求疵的人往往是心胸狹窄和無知的人。
An ignorant person can be dangerous.
無知的人可能是危險的。
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。