dullard的复数形式怎么写

dullard的音标：dullard的英式发音音标为：['dʌlɑ:d]dullard的美式发音音标为：['dʌlɑrd]...

For years, teachers had figured him for a dullard.多年来老师们都以为他是个笨蛋。...

n.愚人，笨蛋...