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SSS 2011-12-14

时间:2012-01-13 03:53来源:互联网 提供网友:gmeng   字体: [ ]
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    (单词翻译:双击或拖选)
 When it comes to sheer celestial1 bling, stars might not corner the market on twinkle, because beneath their rocky exteriors2, some terrestrial planets may be half diamond. So said scientists at the fall meeting of the American Geophysical Union. 
 
The researchers were fixing to study how diamonds form here on Earth, under the conditions found in the planet’s lower mantle3. So they took a tiny sample of iron, carbon, and oxygen, elements abundant in Earth’s interior, and cooked it up at about 3,800 degrees Fahrenheit4 and 9.5 million pounds of pressure per square inch. What they saw was that iron hooks up with oxygen to produce rust5, and leaves behind pockets of carbon, which become diamond.
 
Now, what happens if they look not at Earth but at a planet in a solar system where there’s even more carbon? According to the model, the carbon merges6 with iron to form a core made of steel, leaving a carbon mantle rich with diamond.
 
Whether the Milky7 Way harbors such gems8 is still an open question. One thing is for sure: they probably wouldn’t harbor life, because diamonds readily transfer heat. So a planet made of diamond would be one cold stone.

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1 celestial 4rUz8     
adj.天体的;天上的
参考例句:
  • The rosy light yet beamed like a celestial dawn.玫瑰色的红光依然象天上的朝霞一样绚丽。
  • Gravity governs the motions of celestial bodies.万有引力控制着天体的运动。
2 exteriors 6246866048a2b0eb2dd11edd7f460b50     
n.外面( exterior的名词复数 );外貌;户外景色图
参考例句:
  • You mustn't judge people by their exteriors. 你不能以貌取人。 来自《简明英汉词典》
  • Some artists only paint exteriors. 有些艺术家只画户外景色。 来自《简明英汉词典》
3 mantle Y7tzs     
n.斗篷,覆罩之物,罩子;v.罩住,覆盖,脸红
参考例句:
  • The earth had donned her mantle of brightest green.大地披上了苍翠欲滴的绿色斗篷。
  • The mountain was covered with a mantle of snow.山上覆盖着一层雪。
4 Fahrenheit hlhx9     
n./adj.华氏温度;华氏温度计(的)
参考例句:
  • He was asked for the boiling point of water in Fahrenheit.他被问到水的沸点是华氏多少度。
  • The thermometer reads 80 degrees Fahrenheit.寒暑表指出华氏80度。
5 rust XYIxu     
n.锈;v.生锈;(脑子)衰退
参考例句:
  • She scraped the rust off the kitchen knife.她擦掉了菜刀上的锈。
  • The rain will rust the iron roof.雨水会使铁皮屋顶生锈。
6 merges a03f3f696e7db24b06d3a6b806144742     
(使)混合( merge的第三人称单数 ); 相融; 融入; 渐渐消失在某物中
参考例句:
  • The 2012 Nobel Prize in Literature was awarded to Mo Yan"who with hallucinatory realism merges folk tales, history and the contemporary". 2012年诺贝尔文学奖得主为莫言,他“很好地将魔幻现实与民间故事、历史与当代结合在一起”。
  • A device that collates, merges, or matches sets of punched cards or other documents. 一种整理、合并或比较一组穿孔卡片或其它文档的设备。
7 milky JD0xg     
adj.牛奶的,多奶的;乳白色的
参考例句:
  • Alexander always has milky coffee at lunchtime.亚历山大总是在午餐时喝掺奶的咖啡。
  • I like a hot milky drink at bedtime.我喜欢睡前喝杯热奶饮料。
8 gems 74ab5c34f71372016f1770a5a0bf4419     
growth; economy; management; and customer satisfaction 增长
参考例句:
  • a crown studded with gems 镶有宝石的皇冠
  • The apt citations and poetic gems have adorned his speeches. 贴切的引语和珠玑般的诗句为他的演说词增添文采。
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