NASA研发新型超音速飞机
<p>美国宇航局表示正在研发新一代超音速飞机，该机型发出的声音只有60分贝，远小于协和式超音速飞机的90分贝，噪音仅仅相当于坐在车里听到的汽车发动机的嗡嗡声。美国宇航局已经在风洞里成功测试了相关技术，并预计在2022年对原型机进行测试。如果新型超音速飞机研制成功，那么从纽约到伦敦的飞行时间只需要3小时。</p><p><span word="Nasa">Nasa</span> <span word="might">might</span> <span word="be">be</span> <span word="famous">famous</span> <span word="for">for</span> <span word="sending">sending</span> <span word="rockets">rockets</span> <span word="up">up</span> <span word="to">to</span> <span word="space">space</span> <span word="quickly">quickly</span>. <span word="But">But</span> <span word="it">it</span> <span word="could">could</span> <span word="be">be</span> <span word="making">making</span> <span word="your">your</span> <span word="next">next</span> <span word="holiday">holiday</span> <span word="come">come</span> <span word="more">more</span> <span word="quickly">quickly</span>, <span word="too">too</span>.</p><p>美国宇航局也许因为飞速把火箭送入太空而闻名，但它也有可能为你下个假期所乘的航班提速。</p><p><span word="The">The</span> <span word="space">space</span> <span word="agency">agency</span> <span word="is">is</span> <span word="working">working</span> <span word="on">on</span> <span word="a">a</span> <span word="new">new</span> <span word="plane">plane</span>, <span word="dubbed">dubbed</span> <span word="Concorde">Concorde</span> 2 <span word="by">by</span> <span word="some">some</span> <span word="people">people</span>, <span word="that">that</span> <span word="could">could</span> <span word="solve">solve</span> <span word="the">the</span> <span word="problems">problems</span> <span word="of">of</span> <span word="super">super</span>-<span word="sonic">sonic</span> <span word="flight">flight</span> <span word="and">and</span> <span word="vastly">vastly</span> <span word="increase">increase</span> <span word="the">the</span> <span word="speed">speed</span> <span word="of">of</span> <span word="journeys">journeys</span> <span word="abroad">abroad</span>.</p><p>该机构正在研发一种新型飞机，有人称之为“协和式二号”，它或许可以解决超音速飞机的问题，大幅提升国际航班的飞行速度。</p>
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