2015考研英语阅读老旧飞机的金属疲劳
<p> <span word="Metal">Metal</span> <span word="fatigue">fatigue</span> <span word="in">in</span> <span word="old">old</span> <span word="aircraft">aircraft</span></p><p> 老旧飞机的金属疲劳</p><p> <span word="Flying">Flying</span> <span word="rivets">rivets</span></p><p> 飞行侦查兵</p><p> <span word="A">A</span> <span word="new">new</span> <span word="technique">technique</span> <span word="that">that</span> <span word="listens">listens</span> <span word="for">for</span> <span word="cracks">cracks</span> <span word="in">in</span> <span word="ageing">ageing</span> <span word="aircraft">aircraft</span></p><p> 一项侦听老化飞机断裂的新技术</p><p> <span word="WHEN">WHEN</span> <span word="they">they</span> <span word="were">were</span> <span word="built">built</span>, <span word="no">no</span> <span word="one">one</span> <span word="thought">thought</span> <span word="they">they</span> <span word="would">would</span> <span word="fly">fly</span> <span word="for">for</span> <span word="so">so</span> <span word="long">long</span>.</p><p> 建造飞机的时候，没人认为它们会飞行这么久。</p><p> <span word="But">But</span> <span word="fitted">fitted</span> <span word="with">with</span> <span word="new">new</span> <span word="engines">engines</span> <span word="and">and</span> <span word="avionics">avionics</span>, <span word="aircraft">aircraft</span> <span word="can">can</span> <span word="be">be</span> <span word="kept">kept</span> <span word="going">going</span> <span word="for">for</span> <span word="a">a</span> <span word="very">very</span> <span word="long">long</span> <span word="time">time</span>.</p><p> 但是装有新式引擎和航空电子设备的飞机能持续飞行很长一段时间。</p><p> <span word="The">The</span> <span word="average">average</span> <span word="age">age</span> <span word="of">of</span> <span word="the">the</span> <span word="world">world</span> <span word="s">s</span> <span word="airliners">airliners</span> <span word="is">is</span> <span word="more">more</span> <span word="than">than</span> <span word="ten">ten</span> <span word="years">years</span>, <span word="with">with</span> <span word="some">some</span> <span word="passenger">passenger</span> <span word="jets">jets</span> 25<span word="years">years</span> <span word="old">old</span> <span word="or">or</span> <span word="more">more</span>.</p><p> 全世界飞机的平均机龄超过10年，有些客机的机龄超过了25年。</p><p> <span word="Military">Military</span> <span word="planes">planes</span> <span word="are">are</span> <span word="more">more</span> <span word="geriatric">geriatric</span>: <span word="the">the</span> <span word="Sikorsky">Sikorsky</span> <span word="Black">Black</span> <span word="Hawk">Hawk</span> <span word="helicopter">helicopter</span> <span word="entered">entered</span> <span word="service">service</span> 31<span word="years">years</span> <span word="ago">ago</span> <span word="and">and</span> <span word="the">the</span> <span word="Lockheed">Lockheed</span> <span word="C">C</span>-5 <span word="Galaxy">Galaxy</span> 40 <span word="years">years</span> <span word="back">back</span>.</p><p> 军用飞机更是超龄：西科斯基公司的黑鹰直升机31年前开始服役，洛克希德公司的<span word="C">C</span>-5银河早用到40年了。</p><p> <span word="Both">Both</span> <span word="are">are</span> <span word="still">still</span> <span word="going">going</span> <span word="strong">strong</span>.</p><p> 这两款飞机还都强劲地飞行着。</p><p> <span word="Some">Some</span> <span word="Boeing">Boeing</span> <span word="KC">KC</span>-135 <span word="aerial">aerial</span>-<span word="refuelling">refuelling</span> <span word="planes">planes</span>, <span word="which">which</span> <span word="are">are</span> <span word="based">based</span> <span word="on">on</span> <span word="the">the</span> <span word="venerable">venerable</span> 707, <span word="havebeen">havebeen</span> <span word="flying">flying</span> <span word="for">for</span> <span word="over">over</span> 50 <span word="years">years</span>.</p>
页:
[1]