So, honestly, I don't know for certain yet.
所以，实话说，我都不知道究竟会是谁。
But he added, he did not know for certain.
但是他补充说，他也不确定。
One thing I know for certain: Ira had it wrong.
有一件事我很清楚：Ira搞错了。
Mr Suttles said he "did not know for certain" why it had failed.
Suttles先生说他“并不十分确定”前种方案失败的原因。
Only thing I know for certain is…
我唯一明确知道的一件事情是…
It's too soon to know for certain.
现在还太早，不知道确切情况。
I don't know for certain if she's coming.
我并不确切知道她是否会来。
I know for certain that he's in here, but he won't answer me.
我肯定他就在里面，但他就是不回答我。
I know for certain that he's in there, but he won't answer me.
我肯定他就在里面，但他就是不回答我。
If there is one thing I know for certain, it is that this has to stop.
如果有什么事情是我能确认的，那就是这种情况必须停止。
Jackie and Jean are the only things you know for certain about that day?
杰姬和吉恩，是关于那天你唯一确定的事？
I do not know, for certain, what they mean.
我不知道他们所说的确切含义。
You don't even know, for certain yet, that you have made a mistake.
你甚至不能确定你是否犯了错误。
You don't even know, for certain yet, that you have made a mistake.
你甚至不能确定你是否犯了错误。
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