評(píng)論
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First hold the nail with the wide head by its shaft and push it head-first into the ball of clay. Then do the same with the small-headed nail.
首先將寬頭釘?shù)臈U豎起，將其頭朝下推入橡皮泥球。然后對(duì)窄頭釘再重復(fù)一次。
The small-headed nail goes into the clay much more easily than the wide-headed nail. Since the head of the small nail has less surface area than the big one, the force of your push is concentrated in a smaller area, exerts more pressure on the clay, and so the nail goes in more easily. The same principal causes pointed high-heeled shoes to sink into a soft surface more easily than flat shoes.
窄頭釘比寬頭釘更容易嵌入橡皮泥。由于窄頭釘?shù)念^部面積比寬頭釘小，你的推力將集中在一個(gè)更小的區(qū)域，對(duì)橡皮泥產(chǎn)生更大的壓力，因此釘子更容易嵌入。同理，尖高跟鞋比平跟鞋更易陷入表面柔軟的物體。
By applying this principal to the knife you can see that with a keener edge there’s a greater concentration of the pressure on the edge, so it takes much less force to make the knife cut.
將這一原理運(yùn)用在刀上，你會(huì)發(fā)現(xiàn)，刀刃越鋒利，壓力就會(huì)更加的集中，因此切割起來(lái)也更加省力。
譯文為可可英語(yǔ)翻譯，未經(jīng)授權(quán)請(qǐng)勿轉(zhuǎn)載!
