sudden
adjective uk/ˈsʌd.ən/ us/ˈsʌd.ən/
B2 突然的，忽然的;意外的
happening or done quickly and without warning
Drop the gun, put your hands in the air, and don't make any sudden movements. 把枪放下，手举起来，别轻举妄动。
He had a sudden heart attack while he was on holiday. 他度假时心脏病突然发作。
First they announce their engagement and then they tell me Angie's pregnant - it's all a bit sudden. 他们先是宣布了订婚，接着告诉我安吉怀孕了——一切都有点太突然了。
- More examples
- I'd strongly advise against making a sudden decision.
- Everyone in the office was surprised by Graham's sudden departure.
- There was a sudden loud noise.
- A sudden gust of wind blew his umbrella inside out.
- A sudden snowstorm paralysed the city.
Idiom
all of a suddenidiom informalB2 一下子;突然间
very quickly
It seemed to happen all of a sudden - I felt dizzy and I just collapsed. 一切似乎都发生得很突然——我觉得头晕，然后就晕倒了。