Having said that, I did not know for a long time what I was looking for.
话虽如此，很长一段时间里，我都不知道自己追求的是什么。
But he added, he did not know for certain.
但是他补充说，他也不确定。
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。
The business wants to reduce the cost of the process, but does not know for sure how much it costs per order.
企业希望降低流程的成本，但是无法确定每个订单的具体成本。
I do not know for certain what the future holds but I am confident that with hard work, a little bit of luck and a supportive network of friends, I can be as successful as I want to be.
我不确知未来，但我相信通过艰苦的工作加上一点点的运气和朋友们的帮助，我一定能够心想事成！
We may not know for sure who said it first.
我们也不清楚是谁最先说的这句话。
I will not easily pass What I do not know for sure on to others.
尚未肯定过的事实，不要轻易地传给别人听。
What I do not know for sure, I will not easily pass on to others.
尚未肯定过的事实，不要轻易的传说给别人听。
I think I will remain one more year, but I do not know for sure yet.
我想我可以至少呆一年，但是我还不确定。
But, we will not know for sure until early 2016 when all the weather records are examined.
但是在2016年年初所有气象记录被检查之前我们无法确认这点。
Given this, we shall likely not know for a prolonged period of time how successful the crypto-currency experiment will be.
鉴于此，我们有可能在很长一段时间内无法了解加密货币是否会成功。
We do not know for sure what "hardships" Paul is referring to in our passage for today. They may have involved illness or life-threatening persecution.
我们无法从今天所读的经文中，确定保罗指的“患难”是甚么，它可能是疾病，或是与性命攸关的逼迫。
Thank you too, so I know a lot of information they do not know, for me it is a great help.
实在太感谢你了，让我了解了很多自己不知道的信息，对我的帮助实在很大。
I do not know, for certain, what they mean.
我不知道他们所说的确切含义。
I do not know, for certain, what they mean.
我不知道他们所说的确切含义。
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