adj.突然的；出乎意料的
n.突发之事
His sudden death upset everybody. 他的突然去世使大家深感悲伤。
A sudden smile illuminated her face. 突然的微笑使她容光焕发。
He gave me a fright by bursting into a sudden laughter. 他突然大笑起来，吓了我一跳。
Their sudden attack made us more aware of the danger around us. 他们突然的攻击使我们更加注意我们周围的危险。
His rise to power was very sudden. 他的掌权很令人意外。
用作名词 (n.)sudden的意思是“突然的,忽然的,迅速而意外的”,指事先没有预料到事情会发生,所以当事情发生时使人感到很意外。
all of a sudden的意思是“突然地,出乎意料地”,常用于口语中。也常用on a sudden,意思与all of a sudden相同,但不如all of a sudden正式或常见。
adv.突然地
