If there are things we do not know, it is because we haven't learnt them.
有所不知，盖未学也。
If we do not know the facts, we are in no position to handle such matter.
不了解情况，就无从解决这类问题。
A lot of times we eat because we are bored and we do not know what else to do.
大多时候我们吃零食是因为我们很无聊或者不知该做些什么。
Also, at modeling time, we do not know the number of reviewers required by the process.
另外，在建模时，我们并不知道该流程所需的审阅人员数量。
Of course, just because we have something out there, we do not know if it works or not.
当然，只是有了一项服务，还不知道它能否正常运行。
The 'glass half-empty' view is that there is still much we have ignored and much we do not know.
“悲观”(glass half - empty)的观点则认为，现在还有大量未曾注意到的内容，还大量未知的内容。
We also know there are known unknowns; that is to say we know there are some things we do not know.
我们也知道还有一些已知的未知，也就是说我们知道自己还有一些不知道的事情。
Because we do not know our past, we are ill-at-ease with the present and ill-prepared for the future.
由于我们不知道我们的过去，我们对现在感到不自在，也对未来准备不足。
However, we do not know the mass of the Higgs boson itself, which makes it more difficult to identify.
但是，我们并不知道希格斯玻色子自身的质量，这使得识别它的难度大大增加。
No new board members are listed, meaning that we do not know the identities of participating investors.
该文件并未公布新的董事会成员名单，因此我们无法确定新投资者的身份。
Life is an unknown destination of travel, more time, we do not know what the future of their own will meet.
人生就是一场未知目的地的旅行，更多的时候，我们并不知道自己接下来会遇见怎样的未来。
And though we do not know what Shakespeare was up to in his twenties, we do know that his family was unusually litigious.
虽然我们不知道莎士比亚在他20几岁的时候做了什么，但是我们的确知道他的家族是非常好讼的。
The art of strategic decision-making lies in both how we react to what we do not know and how we react to clearly defined situations.
战略决策制定的艺术在于我们对未知状况和对已知环境的反应。
Although we do not know the long-term consequences of separation or deprivation, we do know that they can produce acute immediate distress.
虽然我们不知道分离和丧失亲人的长期后果，但我们知道它们能立即引起剧烈的悲痛。
Brilliant blue dorados are now swimming along with us, keeping company with zebra-striped pilot fish. Why they all like us we do not know.
美丽的蓝色剑鱼一直伴随着我们，还有斑马条纹的鲭鱼，不知道它们为什么会喜欢我们。
And we do not know when beleaguered consumers, now trying to reconstitute their decimated wealth position, will feel comfortable in beginning to spend.
而且我们也不知道那些目前处于困境之中正努力恢复其财产状况的消费者何时愿意重新开始消费。
As we pursue our efforts to seek signs of life in the solar system, we have to think more broadly, more diversely and consider life as we do not know it.
由于我们正在太阳系寻找生命迹象，所以，我们的思维必须更开阔一些，角度更多一些，对未知的生命进行研究。
'at present we do not know whether this effect is induced by all laptop computers connected by WiFi to the Internet or what use conditions heighten this effect.'
目前尚不清楚是否所有笔记本连接无线网路时都会产生这种影响，也不清楚何种使用方法会加剧这种作用。
We realize the types of IC you need, but we do not know the specification you require for that IC such as the voltage current. Could you please tell us the purpose of this IC?
敝公司了解贵公司所需集成电路之型态，但不明了所需之规格，如电压，电流等等资料，是否能告知此集成电路的用途。
How then does he see? "his parents said," we know that this is our son, and that he was born blind; but we do not know how it is that he now sees, nor do we know who opened his eyes.
如今怎么能看见了呢，他父母回答说，他是我们的儿子，生来就瞎眼，这是我们知道的，至于他如今怎么能看见，我们却不知道，是谁开了他的眼睛，我们也不知道。
You need to become bilingual. On the other hand, we do need better language technology so that we can communicate, to some extent at least, with people whose languages we do not know.
而另一方面，至少在一定程度上我们确实需要更好的翻译器（翻译软件）以打破沟通交流的障碍。
Errors, on the other hand, are unexpected problems — since we do not know in advance what can go wrong, we need to examine the traceback in the actual test run to diagnose such problems.
另一方面，错误是意外的问题——因为我们事先不知道哪里会出错，我们需要分析实际测试运行中的回溯来诊断这种问题。
It is now clear that sleep can consolidate memories by enhancing and stabilizing them and by finding patterns within studied material even when we do not know that patterns might be there.
现在很清楚的是，睡眠可以通过增强和稳定记忆来巩固记忆，也能通过找到学习中的材料暗藏的形态来巩固记忆，而这些形态我们甚至很可能都不知道它们的存在。
Since we do not know when our plug-in will get initialized or whether the Synonym plug-in is initialized, we will simply attempt to register the entries in our XML file right when our plug-in loads.
由于我们不知道何时初始化插件，也不知道是否初始化Synonym 插件，所以我们只要在加载插件时尝试注册XML文件中的条目即可。
We do not know when to plant, " says the farmer Julio Hermandez.
我们不知道什么时候该种地了。
We do not know whether present trends will continue in a straight line, to be sure.
确切地说，我们还不知道目前的趋势是否会一直继续下去。
We do not know that it is true, but we can test this hypothesis with further experience.
我们并不能确定假设正确与否，但进一步的研究能回答这个问题。
We do not know that it is true, but we can test this hypothesis with further experience.
我们并不能确定假设正确与否，但进一步的研究能回答这个问题。
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