释义
- 1. in case (sth happens)
- 2. if
- 3. once (sth happens, then...)
- 4. when
- 5. in a short time
- 6. in one day
词语关系
Usage notes
Common mistakes
'一旦' is often used with 就 to express 'once...then...', as in 一旦开始就不能停止。
例句
显示 1 条一旦 下雨，比赛就会取消。
Once it rains, the match will be canceled.
AI 生成的例句会用此图标标注。