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。
But he added, he did not know for certain.
但是他补充说，他也不确定。
I don't know for certain if she's coming.
我并不确切知道她是否会来。
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 I don't know for certain that it is false.
但我不能确实地知道它是错误的。
One thing I know for certain: Ira had it wrong.
有一件事我很清楚：Ira搞错了。
To know for certain we'd want a couple hundred years of data.
要确切地知道答案，我们就必须有近几百年的资料。
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。
"But," he said, "It's very, very difficult to know for certain."
“但是，”他表示说，“这是非常非常难以说清楚的。”
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。
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。
For example, you might need to know how many files live in a certain directory.
例如，您可能想知道特定目录包含多少个文件。
To know and research leisure, there should be the leisure education for the certain group.
了解和研究休闲，对相应群体的休闲教育是必不可少的。
When we know a date for certain, we'll let you know.
当我们对一个日期确定下来之后，我们会让你们知道的。
I know that for certain you know we belong.
我现在无比的肯定你知道咱们很合适。
"I can" t give you a real reason. I don "t know anything for certain."
我给不出真正的理由。我并非确切地知道某些事情。
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。
你对这件事肯定知道吗？
你对这件事肯定知道吗？
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