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。
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！
I do not know, for certain, what they mean.
我不知道他们所说的确切含义。
Certain claims are not defined by law - for instance, did you know that labels stating "fragrance" may be misleading because they are not required to specify any of the chemicals used in them?
有些宣传语并不是法律规定的——比如，你知道吗？标签上以香氛开头的产品可能误导消费者，因为它们并未被要求必须标明所含的所有化学物质。
Certain claims are not defined by law - for instance, did you know that labels stating "fragrance" may be misleading because they are not required to specify any of the chemicals used in them?
—有些宣传语并不是法律规定的——比如，你知道吗？标签上以香氛开头的产品可能误导消费者，因为它们并未被要求必须标明所含的所有化学物质。
I feel I've made good progress, but I don't know for certain whether or not I'm past the hump here.
到目前为止我觉得已经取得了很大的进展，我不知道我是否已经度过了最困难的事情。
Then the Lord said to him, "Know for certain that your descendants will be strangers in a country not their own, and they will be enslaved and mistreated four hundred years.
耶和华对亚伯兰说：“你要的确知道，你的后裔必寄居别人的地，又服事那地的人；那地的人要苦待他们四百年。
A certain daughter complained to her father about her life and how things have been so hard for her. She did not know how she was going to make it and she wanted to give up.
有一个女孩向她父亲抱怨她的生活，她觉得凡事都很艰难，不知该怎样挺过去，她想放弃。
I said, and he thought it was a great joke though I was serious, that even if I were certain in my own mind, I did not know "a single person with a talent for conviction."
我说，即便我的内心坚定不移，自己也不认识“哪怕一个天生可以使人信服的人”。我说这话时很认真，但他却当我在开玩笑。
It will not belong now before life will take another turn for the better, and you will know for certain that the final ACTS are taking place before the curtain falls to end this cycle of duality.
在生活因为更高的目标而转变前都不会属于现在，你们会因为某些原因知道，最后的行动正在发生，就在帷幕升起结束二元性经历之前。
Since no one can tell the future, it's not possible to know for certain whether the policy holder will or will not die during the term.
因为没有人可以告诉未来它不可能知道是否对某些或者投保人将不会死在任。
From a certain perspective that I really do not know where is the future, but differs from the previous, but different only for time.
从某一角度说我真的不知道未来在哪里，但又和以前不同，但不同的也只是时间而已。
And the same goes for you. If you do not understand certain American behavior or you want to know more about them, do not hesitate to ask them questions about themselves.
换成你也一样，如果你不理解某些美国人的行为或你想知道他们更多的东西，就毫不犹豫地去问他们。
As for me a certain unfairness can say, you said, you did not know.
至于我一定不公平，可以说，你说，你不知道。
When you can count around a hundred or more as per the sighting recently in Mexico, you will know for certain that their origin is not from the Earth.
当你们能够计算出的几百甚至更多的飞船最近在墨西哥被目击的这个事件，你将清楚的知道它们决不是来自地球的。
As you know, nothing in the financial markets is for certain - certainly not when it comes to using technical indicators.
正如你所了解的，金融市场中没有任何事情是确定不变的，当然使用技术指标时也一样。
If someone asks if you are free at a certain time and invites you to an event, you are not required to commit yourself until you know what the invitation is for.
如果有人问如果你有时间在某个时间，并邀请你参加活动，您不需要为了你，直到你知道什么是对的邀请。
For example, if you want to ensure that callers have permission to read a certain file, but you do not know the name of that file until run time, use an imperative demand.
例如，如果要确保调用方拥有读取某个文件的权限，但在运行时之前不知道要读取的文件的名称，此时请使用强制性要求。
But we are not going to know for certain which approach makes sense until additional data is in.
但是我们不会知晓到底哪个方法行得通，直到获取了额外的数据。
Accident has cast them amid certain surroundings, but they have always a nostalgia for a home they know not.
机缘把他们随便抛掷到一个环境中，而他们却一直思念着一处他们自己也不知道坐落在何处的家乡。
Accident has cast them amid certain surroundings, but they have always a nostalgia for a home they know not.
机缘把他们随便抛掷到一个环境中，而他们却一直思念着一处他们自己也不知道坐落在何处的家乡。
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