all of a sudden片語KK [ɔl ʌv ə ˋsʌdən] /ɔl ʌv ə ˈsʌdən/發音片語1突然、忽然、猛然All of a sudden the lights went out and everyone screamed.燈光突然全滅，大家都叫了起來。2無緣無故、莫名其妙地口語Why are you all of a sudden so interested in my work?你怎麼突然對我的工作這麼感興趣？