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But we've got a problem. Tasks are symbolic -- I want to drink, I want to dance -- but the movement system has to contract 600 muscles in a particular sequence.
但在這里出現問題了。動作任務是符號性質的--我要喝水，我要跳舞--但是運動系統需要按特定順序收縮600塊肌肉。
And there's a big gap between the task and the movement system.
況且有一個巨大的鴻溝橫在動作任務和運動系統之間。
So it could be bridged in infinitely many different ways.
意思是我們有無窮多種方式越過這個鴻溝。
So think about just a point to point movement.
來考慮僅僅是點到點的移動。
I could choose these two paths out of an infinite number of paths.
我可以在無窮條可能的路徑中選出這兩條。
Having chosen a particular path, I can hold my hand on that path as infinitely many different joint configurations.
選定一條特定路徑之后，我可以把手放在這條路徑上，但是又有無窮多種關節構型。
And I can hold my arm in a particular joint configuration either very stiff or very relaxed.
另外我把的胳膊固定在某一種構型之后，我可以緊張，也可以松弛。
So I have a huge amount of choice to make.
所以我有非常多的選擇余地。
Now it turns out, we are extremely stereotypical. We all move the same way pretty much.
不過結果是，我們都特別典型。都基本上用同一種方式移動。
And so it turns out we're so stereotypical, our brains have got dedicated neural circuitry to decode this stereotyping.
我們典型到我們的大腦已經開辟出特定的神經回路，來解碼這類典型。
So if I take some dots and set them in motion with biological motion, your brain's circuitry would understand instantly what's going on.
因此如果我拿一些點，然后讓它們按生物動作形式來運動，大家的大腦回路會立即知道怎么回事。
Now this is a bunch of dots moving.
好了，這僅僅是一堆點在動。
You will know what this person is doing, whether happy, sad, old, young -- a huge amount of information.
我們就知道這個人在做什么，是喜還是悲，是老還是少--很大量的信息。
If these dots were cars going on a racing circuit, you would have absolutely no idea what's going on.
如果這些點是賽車在賽道上繞圈，我們對發生了什么就完全沒有概念了。
