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英语沙龙:高科技神话 隐形航空电子技术

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诺思罗普-格鲁曼公司在自己的网站上吹嘘说,“精灵”B-2隐形轰炸机几乎是看不见的,因为该机的复合材料和蝙蝠形状的设计使其难以被雷达发现。

Vaunted1) Technology: Stealth2) Avionics3)

Northrop Grumman Corp.(NGC)boasts4) on its Web site the B-2spirit stealth bomber5) is nearly invisible.Because the plane’s composite materials and bat-shaped design make it hard for radar6) to pick up.However,in 1999,an F-117,which also has a stealthy shape and materials,was blasted out of the sky over the Balkans.Stealth technology is hardly a sham.It shrinks the radar“signature”of a plane.If a conventional aircraft makes a blip on radar screens at 200kilometers,a stealthy plane wouldn’ t appear until it was 34km away.The point is,radar does eventually detect the plane.Weather can also present a problem.The B-2’s materials were tested at Edwards Air Force Base,where it rarely rains.But when the high-tech bombers got drenched7) during missions in the Balkans,the tape used to fill seams in the composite skin often came loose.That en larges the radar signature.

重点单词   查看全部解释    
aircraft ['ɛəkrɑ:ft]

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n. 飞机

 
stealth [stelθ]

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n. 秘密行动,鬼祟

联想记忆
plane [plein]

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adj. 平的,与飞机有关的
n. 飞机,水平

 
boast [bəust]

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v. 吹牛,自夸,说大话
n. 自吹自擂,自夸

 
invisible [in'vizəbl]

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adj. 看不见的,无形的
n. 隐形人(或物

 
drenched [drentʃd]

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adj. 湿透的 动词drench的过去式和过去分词形式

 
base [beis]

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n. 基底,基础,底部,基线,基数,(棒球)垒,[化]碱

 
eventually [i'ventjuəli]

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adv. 终于,最后

 
conventional [kən'venʃənl]

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adj. 传统的,惯例的,常规的

 


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