请输入您要查询的英文单词：
单词
sudden
释义
sudden
2
NOUN
/ˈsʌdn/
PHRASE
-
all of a sudden
if something happens all of a sudden , it happens quickly , and without any sign that it is going to happen
突然地；出乎意料地；突如其来地
All of a sudden, the bedroom window flew open.
突然间，卧室的窗户开了。