北京还要再吸雾霾多少年 数据告诉你
<p><span word="A">A</span> <span word="trickle">trickle</span> <span word="of">of</span> <span word="statements">statements</span> <span word="from">from</span> <span word="Chinese">Chinese</span> <span word="leaders">leaders</span> <span word="in">in</span> <span word="recent">recent</span> <span word="months">months</span> <span word="have">have</span> <span word="given">given</span> <span word="hope">hope</span> <span word="to">to</span> <span word="some">some</span> <span word="residents">residents</span> <span word="of">of</span> <span word="Beijing">Beijing</span> <span word="and">and</span> <span word="other">other</span> <span word="smog">smog</span>-<span word="choked">choked</span> <span word="Chinese">Chinese</span> <span word="cities">cities</span> <span word="that">that</span> <span word="they">they</span> <span word="might">might</span> <span word="regularly">regularly</span> <span word="breathe">breathe</span> <span word="clean">clean</span> <span word="air">air</span> <span word="within">within</span> <span word="a">a</span> <span word="few">few</span> <span word="years">years</span>. <span word="Prime">Prime</span> <span word="Minister">Minister</span> <span word="Li">Li</span> <span word="Keqiang">Keqiang</span> <span word="in">in</span> <span word="March">March</span> <span word="declared">declared</span> <span word="a">a</span> “<span word="war">war</span> <span word="against">against</span> <span word="pollution">pollution</span>,” <span word="for">for</span> <span word="instance">instance</span>.</p><p>中国领导人最近几个月发表的一系列声明，给北京及其他被烟雾笼罩的城市的居民带来了希望，他们可能会在几年之内，实现经常呼吸新鲜空气的梦想。例如，中国总理李克强在今年3月「向环境污染宣战」。</p><p><span word="But">But</span> <span word="China">China</span> <span word="Daily">Daily</span>, <span word="an">an</span> <span word="official">official</span> <span word="English">English</span>-<span word="language">language</span> <span word="newspaper">newspaper</span>, <span word="came">came</span> <span word="in">in</span> <span word="with">with</span> <span word="a">a</span> <span word="reality">reality</span> <span word="check">check</span> <span word="on">on</span> <span word="Wednesday">Wednesday</span> <span word="in">in</span> <span word="the">the</span> <span word="form">form</span> <span word="of">of</span> <span word="an">an</span> <span word="article">article</span> <span word="published">published</span> <span word="under">under</span> <span word="the">the</span> <span word="headline">headline</span> “<span word="Beijing">Beijing</span> <span word="Expects">Expects</span> <span word="Healthy">Healthy</span> <span word="Air">Air</span> <span word="by">by</span> 2030.”</p><p>但周三，官方英文报纸《中国日报》的一篇题为《北京空气质量有望在2030年达标》的报道，将人们拉回到现实中来。</p><p><span word="The">The</span> <span word="article">article</span> <span word="went">went</span> <span word="on">on</span> <span word="to">to</span> <span word="say">say</span> <span word="that">that</span> <span word="it">it</span> <span word="would">would</span> <span word="be">be</span> 16 <span word="years">years</span> <span word="before">before</span> <span word="levels">levels</span> <span word="of">of</span> <span word="dangerous">dangerous</span> <span word="fine">fine</span> <span word="particulate">particulate</span> <span word="matter">matter</span> <span word="in">in</span> <span word="the">the</span> <span word="Chinese">Chinese</span> <span word="capital">capital</span> <span word="would">would</span> <span word="drop">drop</span> <span word="to">to</span> <span word="an">an</span> “<span word="internationally">internationally</span> <span word="recognized">recognized</span> <span word="safe">safe</span> <span word="level">level</span>.” <span word="The">The</span> <span word="fine">fine</span> <span word="particulate">particulate</span> <span word="matter">matter</span> <span word="is">is</span> <span word="known">known</span> <span word="as">as</span> <span word="PM">PM</span> 2.5 <span word="because">because</span> <span word="its">its</span> <span word="diameter">diameter</span> <span word="is">is</span> <span word="less">less</span> <span word="than">than</span> 2.5 <span word="microns">microns</span>. <span word="It">It</span> <span word="can">can</span> <span word="penetrate">penetrate</span> <span word="deep">deep</span> <span word="into">into</span> <span word="the">the</span> <span word="lungs">lungs</span> <span word="and">and</span> <span word="enter">enter</span> <span word="the">the</span> <span word="bloodstream">bloodstream</span>.</p><p>该报道称，北京地区的危险细颗粒物浓度降到「国际公认的安全水平」需要16年的时间。这种细颗粒物的直径不足2.5微米，因此被称为<span word="PM">PM</span>2.5。它能够深入肺部，并进入血液。</p>
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