These fears could just be in our heads, however.
然而，这些恐惧可能只是存在于我们的头脑中。
We know what knowledge lies in other brains or books, and what lies in our heads.
我们知道别人的大脑或书本里有什么知识，我们的头脑里有什么知识。
We know about our world because we've interacted with it, and only by simulating this interaction in our heads can we comprehend the behavior of someone else.
我们了解我们的世界，因为我们在与之交互，并且仅当我们在大脑中模拟这些交互时，我们才能理解其他人的行为。
For some of us, we roll that dreamy film in our heads just because it is the beginning of the New Year, but we are serious about making changes.
对于我们中的一些人来说，我们在脑海中放映那部梦幻般的电影，只是因为它是新年的开始，但我们是认真地想要做出改变。
Their common origin exists in our heads.
他们的共同来源在我们的大脑中存在。
We twentieth century humans live entirely in our heads.
头部是二十一世纪人类的栖居地。
But she adds: "I think the real crisis is in our heads."
不过她又说：“我认为真正的危机在我们心中。”
Since everything is in our heads, we had better not lose them.
因为一切都在我们头上，我们最好不要失去他们。
Remember, we have very little short-term memory (RAM) in our heads.
记住，我们的大脑只有非常有限的短期记忆(short - term memory -RAM)。
Opinions begin to form really fast in our heads: "Wow, what an aggressive jerk."
我们在脑子里迅速地形成意见：“喔，这家伙真太激进了。”
However, we tend to ignore our animalistic traits and live our lives in our heads.
然而，我们往往会忽视我们身上的动物特征，而“活”在我们的脑子中。
Past studies have suggested that time-squeeze stress may be at least partly in our heads.
以往的研究表明，时间紧凑的压力可能至少部分因为我们的大脑。
Because other people's words are in our heads, we may merge them with our own internal monologues.
由于他人的声音出现在我们的头脑当中，我们可能会将其与我们自己的内心独白相混淆。
We are also familiar with that little voice in our heads reminding us how much of a failure we are.
我们对那个提醒着我们自己有多么地失败的小声音很熟悉。
Working memory refers to the amount of information we hold in our heads while we perform other tasks.
工作记忆指当我们处理其他任务的时候，我们在大脑中记住的信息量。
But just telling ourselves, whether out loud or quietly in our heads, that we're going to change isn't enough.
但是，仅仅是大声的或是在心里默默的告诉自己我们要改变，这是不够的。
That little voice in our heads says, "Sure, you can spare just five minutes for your friends and other managers."
我们脑海里一个小小的声音说：好，你只需要为你的朋友和其它经理花费五分钟的时间。
Many of us have lots of old songs stored in our heads, but why not expand your memory by learning a few new tunes?
我们很多人头脑中都储存有许多老歌，但为什么不通过学习一些新的调子来扩充我们的记忆？
Sure, maybewe no longer audibly sound them out, or even move our lips, but in our heads weare “reading to ourselves.”
当然，或许我们已经不会再听见读出来的声音，或者仅仅动动嘴唇，但在我们的大脑中我们是在“将文字都给自己听”。
We all talk silently to ourselves in our heads, but we aren't always conscious of what we're saying or how it's affecting us.
我们一直在默默的跟我们自己交谈，但是我们不是一直都清楚我们在说什么和对我们有什么影响。
Wouldn't it be better if we had more control over these decisions, these thoughts that are constantly bouncing around in our heads?
那岂不是更好，如果我们有更多的控制权这些决定，这些想法是不断反弹约在我们头上？
If we really got clearly in our heads what it is voters are concerned about, it might be possible to let their agenda drive our agenda.
如果我们真的清楚地知道选民们关注什么，那么用他们的议程推动我们的议程是有可能的。
Like a wagging finger in our heads, the region admonishes us to consider long-term benefits over instant rewards when we make decisions.
那个区域好似在脑中摆动的手指，告诫我们在做出决定的时候要考虑长远利益，不要贪图一时的享受。
You know, we all did, as kids having to read a book, and through the author's description put something on the movie screen in our heads.
你知道， 实际上我们都曾经这样做过，当孩子们读一本书的时候，他们会根据作者的描述，在自己头脑中形成一些画面。
In other words, we continue to see a barrier in our heads, even when no 'real' barrier exists between where we are and where we want to go.
换句话说，我们经常会在我们的脑中看到一个障碍，即使我们所在的位置和我们想要达到的位置之间并没有“真正的”障碍。
In other words, we continue to see a barrier in our heads, even when no 'real' barrier exists between where we are and where we want to go.
换句话说，我们经常会在我们的脑中看到一个障碍，即使我们所在的位置和我们想要达到的位置之间并没有“真正的”障碍。
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