马航飞机失联：飞行中可能会遇到的问题
<p><span word="There">There</span>'<span word="s">s</span> <span word="always">always</span> <span word="a">a</span> <span word="risk">risk</span> <span word="in">in</span> <span word="flying">flying</span>, <span word="but">but</span> <span word="the">the</span> <span word="phase">phase</span> <span word="in">in</span> <span word="which">which</span> <span word="a">a</span> <span word="plane">plane</span> <span word="is">is</span> <span word="cruising">cruising</span> <span word="at">at</span> <span word="high">high</span> <span word="altitude">altitude</span> <span word="is">is</span> <span word="widely">widely</span> <span word="considered">considered</span> <span word="to">to</span> <span word="be">be</span> <span word="safe">safe</span>. <span word="And">And</span> <span word="that">that</span>'<span word="s">s</span> <span word="what">what</span> <span word="makes">makes</span> <span word="the">the</span> <span word="mystery">mystery</span> <span word="of">of</span> <span word="what">what</span> <span word="happened">happened</span> <span word="to">to</span> <span word="so">so</span> <span word="confounding">confounding</span>.</p><p>飞行总是存在风险，但人们普遍认为飞机在较高的高度巡航的阶段是安全的。因此马航<span word="MH">MH</span>370的失联才如此让人迷惑。</p><p>"<span word="Whatever">Whatever</span> <span word="happened">happened</span> <span word="happened">happened</span> <span word="quickly">quickly</span> <span word="and">and</span> <span word="resulted">resulted</span> <span word="in">in</span> <span word="a">a</span> <span word="catastrophic">catastrophic</span> <span word="departure">departure</span> <span word="from">from</span> <span word="the">the</span> <span word="air">air</span>," <span word="Mark">Mark</span> <span word="Rosenker">Rosenker</span>, <span word="former">former</span> <span word="chairman">chairman</span> <span word="of">of</span> <span word="the">the</span> <span word="National">National</span> <span word="Transportation">Transportation</span> <span word="Safety">Safety</span> <span word="Board">Board</span> <span word="who">who</span> <span word="is">is</span> <span word="now">now</span> <span word="a">a</span> <span word="consultant">consultant</span> <span word="with">with</span> <span word="CBS">CBS</span> <span word="news">news</span>, <span word="told">told</span> <span word="NPR">NPR</span>'<span word="s">s</span> <span word="Melissa">Melissa</span> <span word="Block">Block</span>.</p><p>美国国家运输安全委员会的前任主席马克·罗森克目前是<span word="CBS">CBS</span>资讯的一名顾问，他对<span word="NPR">NPR</span>的梅丽莎·布洛克表示，“不论发生了什么，一定是在瞬间发生，并且导致了飞机在空中发生了灾难性的事故”。</p><p><span word="There">There</span> <span word="have">have</span> <span word="been">been</span> <span word="a">a</span> <span word="number">number</span> <span word="of">of</span> <span word="cases">cases</span> <span word="in">in</span> <span word="which">which</span> <span word="planes">planes</span> <span word="have">have</span> <span word="fallen">fallen</span> <span word="from">from</span> <span word="the">the</span> <span word="sky">sky</span> — <span word="from">from</span> <span word="factors">factors</span> <span word="that">that</span> <span word="include">include</span> <span word="catastrophic">catastrophic</span> <span word="failure">failure</span> <span word="and">and</span> <span word="sabotage">sabotage</span>. <span word="As">As</span> <span word="Patrick">Patrick</span> <span word="Smith">Smith</span>, <span word="a">a</span> <span word="commercial">commercial</span> <span word="pilot">pilot</span> <span word="who">who</span> <span word="runs">runs</span> <span word="the">the</span> <span word="popular">popular</span>:</p><p>飞机从空中坠落曾经有一些案例，原因包括严重故障和遭到蓄意破坏。民航飞行员帕特里克·史密斯的分析获得了广泛认同：</p><p>"<span word="All">All</span> <span word="we">we</span> <span word="know">know</span> <span word="for">for</span> <span word="sure">sure</span> <span word="is">is</span> <span word="that">that</span> <span word="a">a</span> <span word="plane">plane</span> <span word="went">went</span> <span word="down">down</span> <span word="with">with</span> <span word="no">no</span> <span word="warning">warning</span> <span word="or">or</span> <span word="communication">communication</span> <span word="from">from</span> <span word="the">the</span> <span word="crew">crew</span>. <span word="That">That</span> <span word="the">the</span> <span word="crash">crash</span> <span word="did">did</span> <span word="not">not</span> <span word="happen">happen</span> <span word="during">during</span> <span word="takeoff">takeoff</span> <span word="or">or</span> <span word="landing">landing</span> — <span word="the">the</span> <span word="phases">phases</span> <span word="of">of</span> <span word="flight">flight</span> <span word="when">when</span> <span word="most">most</span> <span word="accidents">accidents</span> <span word="occur">occur</span> — <span word="somewhat">somewhat</span> <span word="limits">limits</span> <span word="the">the</span> <span word="possibilities">possibilities</span>, <span word="but">but</span> <span word="numerous">numerous</span> <span word="possibilities">possibilities</span> <span word="remain">remain</span>. <span word="The">The</span> <span word="culprit">culprit</span> <span word="could">could</span> <span word="be">be</span> <span word="anything">anything</span> <span word="from">from</span> <span word="sabotage">sabotage</span> <span word="to">to</span> <span word="an">an</span> <span word="in">in</span>-<span word="flight">flight</span> <span word="fire">fire</span> <span word="to">to</span> <span word="a">a</span> <span word="catastrophic">catastrophic</span> <span word="structural">structural</span> <span word="failure">failure</span> <span word="of">of</span> <span word="some">some</span> <span word="kind">kind</span> — <span word="or">or</span>, <span word="as">as</span> <span word="is">is</span> <span word="so">so</span> <span word="common">common</span> <span word="in">in</span> <span word="airline">airline</span> <span word="catastrophes">catastrophes</span>, <span word="some">some</span> <span word="combination">combination</span> <span word="or">or</span> <span word="compounding">compounding</span> <span word="of">of</span> <span word="human">human</span> <span word="error">error</span> <span word="and">and</span>/<span word="or">or</span> <span word="mechanical">mechanical</span> <span word="malfunction">malfunction</span>."</p>
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