鸡蛋有红皮、白皮、绿皮，有什么区别？
<p>老人常说，红皮鸡蛋比白皮鸡蛋有营养，这是真的吗？不同颜色的鸡蛋之间有区别吗？为什么鸡蛋壳会有不同颜色？来看看美国专家怎么说。</p><p><span word="Peruse">Peruse</span> <span word="the">the</span> <span word="egg">egg</span> <span word="section">section</span> <span word="of">of</span> <span word="a">a</span> <span word="grocery">grocery</span> <span word="store">store</span> <span word="or">or</span> <span word="farmers">farmers</span> <span word="market">market</span>, <span word="and">and</span> <span word="you">you</span>'<span word="ll">ll</span> <span word="notice">notice</span> <span word="cartons">cartons</span> <span word="of">of</span> <span word="eggs">eggs</span> <span word="separated">separated</span> <span word="into">into</span> <span word="white">white</span> <span word="and">and</span> <span word="brown">brown</span>, <span word="sometimes">sometimes</span> <span word="even">even</span> <span word="green">green</span> <span word="or">or</span> <span word="blue">blue</span> <span word="eggs">eggs</span>. <span word="But">But</span> <span word="once">once</span> <span word="they">they</span> <span word="arrive">arrive</span> <span word="scrambled">scrambled</span> <span word="on">on</span> <span word="a">a</span> <span word="plate">plate</span>, <span word="perhaps">perhaps</span>, <span word="or">or</span> <span word="baked">baked</span> <span word="into">into</span> <span word="a">a</span> <span word="cake">cake</span>, <span word="it">it</span>'<span word="s">s</span> <span word="tough">tough</span> <span word="to">to</span> <span word="tell">tell</span> <span word="the">the</span> <span word="difference">difference</span>. <span word="In">In</span> <span word="fact">fact</span>, <span word="what">what</span> <span word="is">is</span> <span word="the">the</span> <span word="difference">difference</span> <span word="between">between</span> <span word="eggs">eggs</span> <span word="with">with</span> <span word="shells">shells</span> <span word="of">of</span> <span word="different">different</span> <span word="colors">colors</span>?</p><p>去超市或农产品市场仔细观察成箱的鸡蛋，你可能会注意到鸡蛋既有白的，也有褐色的，有时候甚至是绿色或蓝色的。可是变成炒蛋或蛋糕之后，又基本看不出区别了。那么，这些鸡蛋除了蛋壳颜色不一样，还有什么不同呢？</p><p><span word="This">This</span> <span word="isn">isn</span>'<span word="t">t</span> <span word="a">a</span> <span word="flour">flour</span> <span word="or">or</span> <span word="rice">rice</span> <span word="situation">situation</span>. <span word="Brown">Brown</span> <span word="eggs">eggs</span> <span word="are">are</span> <span word="not">not</span> <span word="more">more</span> "<span word="natural">natural</span>," <span word="and">and</span> <span word="white">white</span> <span word="eggs">eggs</span> <span word="have">have</span> <span word="not">not</span> <span word="been">been</span> <span word="decolored">decolored</span> <span word="with">with</span> <span word="bleach">bleach</span>. <span word="Both">Both</span> <span word="varieties">varieties</span> <span word="occur">occur</span> <span word="completely">completely</span> <span word="naturally">naturally</span>, <span word="as">as</span> <span word="do">do</span> <span word="bluish">bluish</span>-<span word="green">green</span> <span word="chicken">chicken</span> <span word="eggs">eggs</span>. <span word="But">But</span> <span word="really">really</span>, <span word="all">all</span> <span word="chicken">chicken</span> <span word="eggs">eggs</span> <span word="are">are</span> <span word="the">the</span> <span word="same">same</span> <span word="on">on</span> <span word="the">the</span> <span word="inside">inside</span>. <span word="So">So</span> <span word="what">what</span> <span word="causes">causes</span> <span word="different">different</span> <span word="egg">egg</span> <span word="colors">colors</span> <span word="among">among</span> <span word="the">the</span> <span word="same">same</span> <span word="type">type</span> <span word="of">of</span> <span word="bird">bird</span>?</p><p>这跟面粉或大米不一样。褐色的鸡蛋不一定更“纯天然”，而白色鸡蛋也不是被漂白了。相反，它们生来就是那样的，包括蓝绿色的鸡蛋也是。但不管蛋壳颜色如何，它们的内在实际上都是一样的。那为什么这些鸡蛋都是母鸡生的，“肤色”却各有不同呢？</p>
页:
[1]