| 释义 |
all of a sudden
quickly， without advance warning 突然
*It started out to be a beautiful day．Then， all of a sudden，it became cloudy and began to rain．开始，天气晴朗。后来，突然多云而且开始下雨。
*All of a sudden a man burst out of the building， and made off down the road．突然，一个人从大楼里冲出来，沿着大路逃跑。 |