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What a light bulb and an egg have in common? The shell of an egg and the glass exterior of a light bulb have more than one thing in common. First, both protect something delicate inside: the exterior of the light bulb keeps the delicate internal wiring protected and an eggshell protects a developing chick.The need to protect chicks and wiring requires that eggshells and light bulbs be structurally strong.
電燈泡和雞蛋有什么共同點(diǎn)呢？雞蛋的外殼和燈泡的玻璃外罩的相同點(diǎn)可不止一處。首先，兩者都在保護(hù)內(nèi)部脆弱的東西：燈泡的外罩保護(hù)精細(xì)的內(nèi)部接線，而蛋殼保護(hù)還未孵化的小雞。為了保護(hù)小雞和燈絲，要求蛋殼和燈罩的結(jié)構(gòu)性很強(qiáng)。
Second, both are made of thin material. A chick, ready to hatch, has to be able to peck its way through the shell. And because light bulbs are usually made of opaque rather than clear glass, the glass exterior must be thin so that light can shine through.
其次，兩者都由薄型材料構(gòu)成。一只待孵化的小雞必須能夠破開蛋殼鉆出來。且因?yàn)闊襞萃ǔＳ刹煌该鞯牟Ａё龀桑圆Ａ庹忠鼙。@樣燈光才能透過燈罩射出去。
So how can a structure be strong and yet made of thin material at the same time? By using a carefully-designed oval shape. Picture for a moment a square egg. If you took that imaginary object in your hand and squeezed it very hard between your thumb and finger, the pressure you'd exert would be localized in the exact part of the flat surface your thumb and finger were pushing. Even a slight pressure would be great enough to break the thin shell into pieces.
那么什么樣的結(jié)構(gòu)即堅(jiān)固同時(shí)又能由薄層的材料制成呢？通過利用一種精心設(shè)計(jì)的橢圓形。暫且先描繪一個(gè)方形的蛋。假設(shè)你把這個(gè)虛構(gòu)的對(duì)象拿在手里，用拇指和食指用力擠壓，你施加的壓力會(huì)落在拇指和食指接觸到的平面上。即使是輕微的壓力也足以將薄薄的蛋殼打得粉碎。
But if you do the same thing to a real egg, the force you exert is not localized in one point, but is distributed into all directions around the surface of the egg. Though you can eventually break an egg by doing this, it takes a great deal more force to do so. Of course, it's no coincidence that the shapes of light bulbs and eggs are similar. When the light bulb was invented and perfected, it was patterned after a shape that nature had come up with hundreds of thousands of years ago.
但是如果你擠壓一個(gè)真正的雞蛋，那么你施加的壓力并不著力在一個(gè)點(diǎn)上，而是分散在蛋殼表面的各個(gè)方向。盡管你最終還是可以將雞蛋捏碎，但在那之前你要使更多的勁。當(dāng)然，燈泡的形狀跟雞蛋相似并不是偶然現(xiàn)象。燈泡的發(fā)明和完善還是仿照了大自然幾十萬年前就有的形狀。
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