2015考研英语阅读越敲越结实
<p> <span word="Materials">Materials</span> <span word="science">science</span></p><p> 材料科学</p><p> <span word="Stronger">Stronger</span> <span word="when">when</span> <span word="stricken">stricken</span></p><p> 越敲越结实</p><p> <span word="A">A</span> <span word="new">new</span> <span word="material">material</span> <span word="that">that</span> <span word="gets">gets</span> <span word="stiffer">stiffer</span> <span word="when">when</span> <span word="it">it</span> <span word="is">is</span> <span word="stressed">stressed</span></p><p> 一种受外力时硬度提高的新材料</p><p> <span word="ONE">ONE</span> <span word="of">of</span> <span word="the">the</span> <span word="valuable">valuable</span> <span word="properties">properties</span> <span word="of">of</span> <span word="bone">bone</span> <span word="is">is</span> <span word="that">that</span> <span word="when">when</span> <span word="it">it</span> <span word="endures">endures</span> <span word="repeated">repeated</span> <span word="stress">stress</span> <span word="it">it</span> <span word="respondsby">respondsby</span> <span word="becoming">becoming</span> <span word="denser">denser</span> <span word="and">and</span> <span word="stronger">stronger</span>.</p><p> 骨头有一种很珍贵的属性，那就是当受到反复的击打时，其质地反而会变得更加紧密，坚硬度变得更高。</p><p> <span word="A">A</span> <span word="living">living</span> <span word="material">material</span> <span word="can">can</span> <span word="do">do</span> <span word="that">that</span>.</p><p> 只有活性材料具备这种特征，</p><p> <span word="A">A</span> <span word="non">non</span>-<span word="living">living</span> <span word="one">one</span> <span word="cannot">cannot</span>.</p><p> 非活性材料则不具备。</p><p> <span word="It">It</span> <span word="has">has</span> <span word="no">no</span> <span word="way">way</span> <span word="of">of</span> <span word="adding">adding</span> <span word="the">the</span> <span word="extra">extra</span> <span word="matter">matter</span> <span word="needed">needed</span> <span word="to">to</span> <span word="provide">provide</span> <span word="the">the</span> <span word="extra">extra</span> <span word="density">density</span>.</p><p> 用添加必要物质来让材料获得更高密度的方法是不可行的，</p><p> <span word="But">But</span> <span word="it">it</span> <span word="would">would</span> <span word="help">help</span> <span word="engineers">engineers</span> <span word="a">a</span> <span word="lot">lot</span> <span word="if">if</span> <span word="non">non</span>-<span word="living">living</span> <span word="stuff">stuff</span> <span word="could">could</span> <span word="at">at</span> <span word="least">least</span> <span word="stiffen">stiffen</span> <span word="in">in</span> <span word="response">response</span> <span word="tostressand">tostressand</span> <span word="that">that</span> <span word="may">may</span> <span word="now">now</span> <span word="be">be</span> <span word="possible">possible</span>.</p><p> 但如果非活性材料起码可以在外力作用下变得坚硬目前达到这一点是可能的，</p><p> <span word="Brent">Brent</span> <span word="Carey">Carey</span>, <span word="a">a</span> <span word="graduate">graduate</span> <span word="student">student</span> <span word="at">at</span> <span word="Rice">Rice</span> <span word="University">University</span> <span word="in">in</span> <span word="Texas">Texas</span>, <span word="thinks">thinks</span> <span word="he">he</span> <span word="has">has</span> <span word="found">found</span> <span word="a">a</span> <span word="way">way</span> <span word="tomake">tomake</span> <span word="it">it</span> <span word="happen">happen</span>.</p><p> 那么这对工程师们来说有非常大的借鉴意义。布伦特凯利是一名德州莱斯大学的研究生，他认为他已找到了实现这一设想的办法。</p>
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