美国自由女神像原来不是绿色的？
<p>如果你没看过美国自由女神像的老照片，你大概以为自由女神像一直都是绿色的吧。其实，最初的女神像是古铜色的，那她是怎么一步一步变成绿色的呢？一起来了解其中奥妙。</p><p><span word="New">New</span> <span word="York">York</span>'<span word="s">s</span> <span word="iconic">iconic</span>, <span word="blue">blue</span>-<span word="green">green</span> <span word="statue">statue</span> <span word="of">of</span> <span word="liberty">liberty</span> <span word="wasn">wasn</span>'<span word="t">t</span> <span word="always">always</span> <span word="green">green</span>.</p><p>纽约的标志性蓝绿色自由女神像并不一直都是绿色的。</p><p><span word="When">When</span> <span word="the">the</span> <span word="statue">statue</span> <span word="was">was</span> <span word="gifted">gifted</span> <span word="to">to</span> <span word="the">the</span> <span word="US">US</span> <span word="from">from</span> <span word="France">France</span> <span word="in">in</span> 1885, <span word="she">she</span> <span word="was">was</span> <span word="actually">actually</span> <span word="a">a</span> <span word="shiny">shiny</span> <span word="copper">copper</span> <span word="color">color</span>.</p><p>1885年法国把这座女神像送给美国时，她实际上是亮闪闪的古铜色。</p><p><span word="A">A</span> <span word="new">new</span> <span word="video">video</span> <span word="reveals">reveals</span> <span word="the">the</span> <span word="chemical">chemical</span> <span word="reactions">reactions</span> <span word="involving">involving</span> <span word="oxygen">oxygen</span> <span word="and">and</span> <span word="even">even</span> <span word="air">air</span> <span word="pollution">pollution</span> <span word="that">that</span> <span word="led">led</span> <span word="to">to</span> <span word="her">her</span> <span word="color">color</span> <span word="change">change</span> <span word="from">from</span> <span word="copper">copper</span> <span word="to">to</span> <span word="liberty">liberty</span> <span word="green">green</span>.</p><p>最近有个视频揭示了氧气和空气污染是如何与女神像发生化学反应，把古铜色变成绿色的。</p>
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