科学家证实月球两极有冰存在
文章来源:未知 文章作者:enread 发布时间:2018-08-23 08:01 字体: [阅读网大 ]  进入论坛
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Scientists said Tuesday they have confirmed the existence of ice on the Moon's surface for the first time.
 
科学家周二表示,他们已首次确定月球表面有冰存在。
 
Signs of ice on the Moon have been reported by scientists for years, but previous observations could have been explained by other phenomena1, such as unusually reflective lunar soil, the study authors said.
 
"This is the first time scientists have definitive2 evidence for the presence of water ice on the surface," lead author Shuai Li of the Hawaii Institute of Geophysics and Planetology told AFP.
 
The ice mainly lies in the frigid3 shadows of craters4 at the lunar poles, and was detected using instruments that flew on the Chandrayaan-1 spacecraft, launched in 2008 by the Indian Space Research Organization.
 
Using data from NASA's Moon Mineralogy Mapper (M3) instrument, researchers identified three chemical signatures "that definitively5 prove there is water ice at the surface of the Moon," said a NASA statement. 
 
The polar regions where the ice lies are "super cold," Li said, noting that the  warmest temperatures never reach above minus 250 degrees Fahrenheit6 (-157 Celsius7.
 
It is unclear exactly how much ice exists on the surface, since the instruments could only detect ice within a few millimeters of the Moon's surface, he said.


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1 phenomena 8N9xp     
n.现象
参考例句:
  • Ade couldn't relate the phenomena with any theory he knew.艾德无法用他所知道的任何理论来解释这种现象。
  • The object of these experiments was to find the connection,if any,between the two phenomena.这些实验的目的就是探索这两种现象之间的联系,如果存在着任何联系的话。
2 definitive YxSxF     
adj.确切的,权威性的;最后的,决定性的
参考例句:
  • This book is the definitive guide to world cuisine.这本书是世界美食的权威指南。
  • No one has come up with a definitive answer as to why this should be so.至于为什么该这样,还没有人给出明确的答复。
3 frigid TfBzl     
adj.寒冷的,凛冽的;冷淡的;拘禁的
参考例句:
  • The water was too frigid to allow him to remain submerged for long.水冰冷彻骨,他在下面呆不了太长时间。
  • She returned his smile with a frigid glance.对他的微笑她报以冷冷的一瞥。
4 craters 1f8461e3895b38f51c992255a1c86823     
n.火山口( crater的名词复数 );弹坑等
参考例句:
  • Small meteorites have left impact craters all over the planet's surface. 这个行星的表面布满了小块陨石留下的撞击坑。 来自《简明英汉词典》
  • The battlefield was full of craters made by exploding shells. 战场上布满弹坑。 来自《现代英汉综合大词典》
5 definitively bfa3c9e3e641847693ee64d5d8ab604b     
adv.决定性地,最后地
参考例句:
  • None of the three super-states could be definitively conquered even by the other two in combination. 三个超级国家中的任何一国都不可能被任何两国的联盟所绝对打败。 来自英汉文学
  • Therefore, nothing can ever be definitively proved with a photograph. 因此,没有什么可以明确了一张照片。 来自互联网
6 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。
7 阅读网Celsius AXRzl     
adj.摄氏温度计的,摄氏的
参考例句:
  • The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
  • The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。
TAG标签: moon ice lunar
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