for certain
US /fɔr ˈsɜrtən/
UK /fɔː ˈsɜːtn/
短语
确信, 肯定
without doubt; definitely
示例:
•
I know for certain that he was at the party.
我确信他当时在派对上。
•
Can you tell me for certain when the meeting will start?
你能确定告诉我会议什么时候开始吗？