- occurring or done quickly and unexpectedly or without warning突然的; 意外的; 突然发生的：
a sudden bright flash.
一道突然的明亮闪光。
- poetic/literary or informal suddenly〈诗/文或非正式〉突然地：
sudden there swooped an eagle downward
一只鹰突然猛扑下来。
短语
(all) of a sudden
- suddenly突然地：
I feel really tired all of a sudden.
我突然间感到真的很累。
on a sudden
- archaic way of saying all of a sudden.〈古〉同all of a sudden.
派生词
suddenness
noun词源
Middle English: from Anglo-Norman French sudein, from an alteration of Latin subitaneus, from subitus 'sudden'.