极端严寒天气席卷美国 芝加哥变身“芝伯利亚”
<p><span word="How">How</span> <span word="cold">cold</span> <span word="is">is</span> <span word="it">it</span>?</p><p><span word="It">It</span>'<span word="s">s</span> <span word="so">so</span> <span word="cold">cold</span>, <span word="even">even</span> <span word="polar">polar</span> <span word="bears">bears</span> <span word="and">and</span> <span word="penguins">penguins</span> <span word="were">were</span> <span word="being">being</span> <span word="kept">kept</span> <span word="indoors">indoors</span> <span word="Monday">Monday</span>.</p><p><span word="Anana">Anana</span>, <span word="the">the</span> <span word="lone">lone</span> <span word="polar">polar</span> <span word="bear">bear</span> <span word="at">at</span> <span word="the">the</span> <span word="Lincoln">Lincoln</span> <span word="Park">Park</span> <span word="Zoo">Zoo</span> <span word="in">in</span> <span word="Chicago">Chicago</span>, <span word="has">has</span> <span word="never">never</span> <span word="grown">grown</span> <span word="the">the</span> <span word="thick">thick</span> <span word="layer">layer</span> <span word="of">of</span> <span word="fat">fat</span> <span word="that">that</span> <span word="bears">bears</span> <span word="in">in</span> <span word="their">their</span> <span word="native">native</span> <span word="Arctic">Arctic</span> <span word="develop">develop</span> <span word="to">to</span> <span word="insulate">insulate</span> <span word="themselves">themselves</span> <span word="against">against</span> <span word="winter">winter</span> <span word="temperatures">temperatures</span> <span word="that">that</span> <span word="can">can</span> <span word="range">range</span> <span word="as">as</span> <span word="low">low</span> <span word="as">as</span> -50 <span word="degrees">degrees</span> <span word="F">F</span>, <span word="zoo">zoo</span> <span word="spokeswoman">spokeswoman</span> <span word="Sharon">Sharon</span> <span word="Dewar">Dewar</span> <span word="said">said</span>. <span word="So">So</span> <span word="when">when</span> <span word="temperatures">temperatures</span> <span word="plunged">plunged</span> <span word="well">well</span> <span word="into">into</span> <span word="the">the</span> <span word="negative">negative</span> <span word="range">range</span> <span word="in">in</span> <span word="Chicago">Chicago</span>, <span word="Anana">Anana</span> <span word="stayed">stayed</span> <span word="in">in</span> <span word="a">a</span> 40<span word="ish">ish</span>-<span word="degree">degree</span> <span word="habitat">habitat</span>, <span word="Dewar">Dewar</span> <span word="said">said</span>.</p><p>"<span word="In">In</span> <span word="the">the</span> <span word="wild">wild</span>, <span word="they">they</span> <span word="would">would</span> <span word="seasonally">seasonally</span> <span word="eat">eat</span> <span word="seals">seals</span> <span word="and">and</span> <span word="fatten">fatten</span> <span word="themselves">themselves</span> <span word="up">up</span> <span word="with">with</span> <span word="that">that</span> <span word="blubber">blubber</span>," <span word="Dewar">Dewar</span> <span word="said">said</span>. <span word="But">But</span> <span word="zookeepers">zookeepers</span> "<span word="don">don</span>'<span word="t">t</span> <span word="feed">feed</span> <span word="them">them</span> <span word="seals">seals</span> <span word="or">or</span> <span word="fatten">fatten</span> <span word="them">them</span> <span word="up">up</span>," <span word="she">she</span> <span word="said">said</span>.</p><p><span word="And">And</span> <span word="at">at</span> <span word="the">the</span> <span word="National">National</span> <span word="Aviary">Aviary</span> <span word="in">in</span> <span word="Pittsburgh">Pittsburgh</span>, <span word="both">both</span> <span word="bald">bald</span> <span word="eagles">eagles</span> <span word="and">and</span> <span word="African">African</span> <span word="penguins">penguins</span> "<span word="who">who</span> <span word="are">are</span> <span word="used">used</span> <span word="to">to</span> <span word="temperate">temperate</span> <span word="climates">climates</span>" <span word="were">were</span> <span word="taken">taken</span> <span word="off">off</span> <span word="exhibit">exhibit</span> <span word="until">until</span> <span word="the">the</span> <span word="weather">weather</span> <span word="warms">warms</span> <span word="up">up</span>, <span word="the">the</span> <span word="facility">facility</span> <span word="reported">reported</span>.</p><p><span word="Chicago">Chicago</span> <span word="saw">saw</span> <span word="a">a</span> <span word="record">record</span> <span word="low">low</span> <span word="of">of</span> <span word="minus">minus</span> 16 (<span word="minus">minus</span> 27 <span word="C">C</span>) <span word="on">on</span> <span word="Monday">Monday</span>. <span word="The">The</span> <span word="day">day</span>'<span word="s">s</span> <span word="high">high</span> <span word="was">was</span> <span word="minus">minus</span> 11, <span word="with">with</span> <span word="a">a</span> <span word="windchill">windchill</span> <span word="of">of</span> <span word="minus">minus</span> 34. <span word="It">It</span>'<span word="s">s</span> <span word="part">part</span> <span word="of">of</span> <span word="an">an</span> <span word="Arctic">Arctic</span> <span word="blast">blast</span> <span word="that">that</span> <span word="plunged">plunged</span> <span word="deep">deep</span> <span word="into">into</span> <span word="the">the</span> <span word="central">central</span> <span word="United">United</span> <span word="States">States</span> <span word="on">on</span> <span word="Monday">Monday</span>, <span word="leaving">leaving</span> <span word="Nashville">Nashville</span>, <span word="Tennessee">Tennessee</span>, 40 <span word="degrees">degrees</span> <span word="colder">colder</span> <span word="than">than</span> <span word="Albany">Albany</span>, <span word="New">New</span> <span word="York">York</span>; <span word="Memphis">Memphis</span> 20 <span word="degrees">degrees</span> <span word="colder">colder</span> <span word="than">than</span> <span word="Anchorage">Anchorage</span>, <span word="Alaska">Alaska</span>; <span word="and">and</span> <span word="Atlanta">Atlanta</span> <span word="colder">colder</span> <span word="than">than</span> <span word="Moscow">Moscow</span> -- <span word="Russia">Russia</span> <span word="or">or</span> <span word="Idaho">Idaho</span>, <span word="take">take</span> <span word="your">your</span> <span word="pick">pick</span>.</p><p><span word="The">The</span> <span word="bitter">bitter</span> <span word="cold">cold</span> <span word="that">that</span> <span word="a">a</span> "<span word="polar">polar</span> <span word="vortex">vortex</span>" <span word="is">is</span> <span word="pushing">pushing</span> <span word="into">into</span> <span word="much">much</span> <span word="of">of</span> <span word="the">the</span> <span word="United">United</span> <span word="States">States</span> <span word="is">is</span> <span word="not">not</span> <span word="just">just</span> <span word="another">another</span> <span word="winter">winter</span> <span word="storm">storm</span>. <span word="It">It</span>'<span word="s">s</span> <span word="the">the</span> <span word="coldest">coldest</span> <span word="in">in</span> 20 <span word="years">years</span> <span word="in">in</span> <span word="many">many</span> <span word="areas">areas</span>. <span word="The">The</span> <span word="South">South</span> <span word="was">was</span> <span word="downright">downright</span> <span word="balmy">balmy</span> <span word="compared">compared</span> <span word="to">to</span> <span word="the">the</span> <span word="Great">Great</span> <span word="Lakes">Lakes</span> <span word="region">region</span>, <span word="where">where</span> <span word="temperatures">temperatures</span> <span word="hovered">hovered</span> <span word="in">in</span> <span word="the">the</span> <span word="negative">negative</span> 20<span word="s">s</span> -- <span word="before">before</span> <span word="wind">wind</span> <span word="chill">chill</span>, <span word="which">which</span> <span word="dropped">dropped</span> <span word="temps">temps</span> <span word="to">to</span> <span word="the">the</span> <span word="negative">negative</span> 40<span word="s">s</span> <span word="and">and</span> <span word="in">in</span> <span word="places">places</span> <span word="like">like</span> <span word="Minneapolis">Minneapolis</span>.</p>
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