被纸割伤为什么那么疼？真是十指连心？

 　　Paper seems completely harmless, but deployed¹ properly, it can be a serious weapon: paper cuts are just the worst.

　　纸看起来无害，但合理使用的话，它也能成为犀利的武器：最严重的状况就是被纸割伤。

　　It’s all to do with nerve endings. To start with, there are lots more pain receptors embedded² in your fingertips than almost anywhere else in your body. So while a paper cut on your arm, or thigh³, or ankle might still be annoying, it would probably be more trivial than the intense fiery⁴ quality that finger-based paper cuts tend to have.

　　这跟神经末梢有关。首先，指尖的痛觉感受器比其他任何身体部位要多得多。所以，虽然纸割伤胳膊、大腿、脚踝也很疼，但也要比割伤手指那种火辣辣的疼痛感要轻得多。

　　被纸割伤为什么那么疼？真是十指连心？

　　This actually makes a good deal of evolutionary⁵ sense. Fingertips are how we explore the world, how we do small delicate tasks. So it makes sense that we have a lot of nerve endings there. It’s kind of a safety mechanism⁶.

　　这其实是非常符合进化论的。我们用指尖来探索世界，做精细工作，所以指尖就该有很多神经末梢，这是一种安全机制。

　　To the naked eye, it might seem as if a paper's edge is fairly straight and smooth. But if you were to zoom⁷ in, you’d find that paper is more akin⁸ to a saw than to a blade.

　　肉眼看着好像纸的边缘很直很平，但如果你放大看，会发现纸更像锯而非刀片。

　　And paper cuts are typically shallow – but not too shallow. They’re deep enough to get past the top layer of the skin, otherwise they wouldn’t hurt. The top layer of skin has no nerve endings. But they don’t slice that deep into your body, which is perhaps why it’s puzzling that they should hurt so much. A deeper wound would result in bleeding. The blood would clot⁹ and a scab would develop, beneath which the skin could go about healing free from the continuedassault of the outside world. But the shallow wound of a paper cut doesn't offer such protection.

　　被纸割出的伤口浅，但也不是太浅。伤口深入到皮肤表层之下，否则就不疼了，皮肤表层没有神经末梢。但他们还不太深，这可能就是为什么人们会疑惑怎么这么疼，更深的伤口会引起出血，血会凝结，然后结痂，下面的皮肤可以不受外界干扰自行修复。但纸割出的浅的伤口就没有这种保护。

　　Without the cushion of blood, pain receptors are left exposed to the elements, and unless you quickly bandage your paper cut, those neurons will keep on sending the alarm bell. That, after all, is their job.

　　没有血液的这种保护作用，痛觉感受器被暴露在自然环境之中，除非快速包扎伤口，否则神经元会一直传送警报，毕竟这就是它们的工作。

　　Unfortunately, each of us is going to face the prospect¹⁰ of enduring a few paper cuts as we go about our lives. Luckily, a thousand paper cuts would really really hurt, but it probably wouldn’t kill you.

　　不幸的是，我们在生活中都会被纸割伤几次。但幸运的是，被纸割伤一千次可能真的非常非常疼，但也死不了。

1 deployed   

（尤指军事行动）使展开( deploy的过去式和过去分词 )； 施展； 部署； 有效地利用

参考例句：

• Tanks have been deployed all along the front line. 沿整个前线已部署了坦克。
• The artillery was deployed to bear on the fort. 火炮是对着那个碉堡部署的。

2 embedded   

a.扎牢的

参考例句：

• an operation to remove glass that was embedded in his leg 取出扎入他腿部玻璃的手术
• He has embedded his name in the minds of millions of people. 他的名字铭刻在数百万人民心中。

3 thigh   

n.大腿；股骨

参考例句：

• He is suffering from a strained thigh muscle.他的大腿肌肉拉伤了，疼得很。
• The thigh bone is connected to the hip bone.股骨连着髋骨。

4 fiery   

adj.燃烧着的，火红的；暴躁的；激烈的

参考例句：

• She has fiery red hair.她有一头火红的头发。
• His fiery speech agitated the crowd.他热情洋溢的讲话激动了群众。

5 evolutionary   

adj.进化的；演化的，演变的；[生]进化论的

参考例句：

• Life has its own evolutionary process.生命有其自身的进化过程。
• These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。

6 mechanism   

n.机械装置；机构，结构

参考例句：

• The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
• The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。

7 zoom   

n.急速上升；v.突然扩大，急速上升

参考例句：

• The airplane's zoom carried it above the clouds.飞机的陡直上升使它飞到云层之上。
• I live near an airport and the zoom of passing planes can be heard night and day.我住在一个飞机场附近，昼夜都能听到飞机飞过的嗡嗡声。

8 akin   

adj.同族的，类似的

参考例句：

• She painted flowers and birds pictures akin to those of earlier feminine painters.她画一些同早期女画家类似的花鸟画。
• Listening to his life story is akin to reading a good adventure novel.听他的人生故事犹如阅读一本精彩的冒险小说。

9 clot   

n.凝块；v.使凝成块

参考例句：

• Platelets are one of the components required to make blood clot.血小板是血液凝固的必须成分之一。
• The patient's blood refused to clot.病人的血液无法凝结。

10 prospect   

n.前景，前途；景色，视野

参考例句：

• This state of things holds out a cheerful prospect.事态呈现出可喜的前景。
• The prospect became more evident.前景变得更加明朗了。