Each episode will focus on a different area of science and tell us what we know, how we know it, and what we still don't know.
每一集都将聚焦于一个不同的科学领域，告诉我们，我们知道什么，我们是如何知道的，以及我们仍然不知道什么。
It's a question rather of how we know the author to be there firstly, and secondly, whether or not we should appeal to the authority of an author.
首先我们如何知道作者在那儿，其次，我们是否应该诉诸作者的权威。
不过你知道我们怎么晓得的吗？
这里是我们怎样知道的。
Also, it is cylindrically symmetric around the bonding axis, so this is how we know that it's a sigma orbital.
此外，它关于键轴是圆柱对称的，这就是为什么我们知道它是sigma轨道。
Often people ask me how we know which ideas to choose from all the hundreds of ideas we've generated during brainstorm sessions.
经常有人问我怎样才能从头脑风暴中所获得的数以百计的创意中选出合适的一个。
We know that we've already learned from Heidegger and the hermeneutic tradition that we know them as something, but it remained to show how we know them.
海德格尔已经告诉我们,从解释学的角度出发我们认知了什么，但是我们是怎么认知的呢？
“We often remark on how healthy or unhealthy someone looks, but it can be very difficult to say precisely how we know this, ” said lead researcher Vinet Coetzee.
主要研究人员Vinet Coetzee说：“我们经常评论某人多么健康或多么不健康，但很难详细说出健康与不健康的界定。”
Surprised at the bad outcomes of our actions, we may learn how to do better by imagining what would have happened if we had acted differently from how we know only too well we did act.
我们对我们行为产生的不好结果感到惊奇，因此我们会通过想象假如我们不是这样做的事情会怎样来学会将来如何把事情做的更好。
And all of those long notes are coming on the downbeat so that's how we start to hear that as a downbeat and that's how we know to make our hand go down at that point so that's one way.
所有的长音都出现在重拍上，这就是我们怎么判断出重拍，如何判断出该什么时候把手往下摆的，所以那是一条途径？
"How come we never know what's going on?" he groused.
“我们怎么会不知道发生了什么事？”他抱怨道。
We don't know how the transcript leaked.
我们不知道抄本是怎样泄露的。
Answer me this: how did they know we were here?
回答我这个问题：他们怎么知道我们在这儿？
How do we know which subjects benefit society?
我们怎么知道哪些学科有益于社会？
How do we know when this figure was carved?
我们怎么知道这个雕像是什么时候雕刻的呢？
How can we know the exact names of everything?
我们怎么能够知道所有东西的确切名称呢?
How do we know when to invest in an upgrade?
我们如何知道何时投资升级？
How do we know one thing or process is more complex than another?
我们怎么知道一件事物或一个过程比另一样更复杂呢？
How do we know, for example, that the stars are really huge balls of fire like the Sun and very far away?
比如说，我们怎么知道恒星真的是像太阳一样巨大的火球，而且离我们很远呢？
So, we know how certain continents are currently moving.
那么，我们知道某些大陆目前是如何移动的。
How were we to know that he was a numbskull?
我们怎么会知道他是个笨蛋呢？
When Ted was six we decided that he needed to know how to fasten and unfasten his seat belt.
泰德六岁时，我们决定让他知道怎样系和解他的安全带。
How do we know that the signature is contemporaneous with the document?
我们怎样才能知道这个签字和文件是同一个时间的呢？
We didn't know how we would cope once the money had gone.
一旦钱花光了，我们就不知道该怎么办了。
I don't know exactly how we'll manage it , but we will, somehow.
我说不准我们如何去完成这件事，但不管怎样我们一定会完成的。
I don't know offhand how much we made last year.
我一时还真说不清我们去年赚了多少钱。
We don't know how this situation will shake out.
我们不知道这个局面会如何收尾。
We need skilled workers and technical know-how.
我们需要熟练工人和专业技术知识。
We need skilled workers and technical know-how.
我们需要熟练工人和专业技术知识。
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