1. In short, icy cometary material probably has not been important in providing water for the earth's oceans, but there is little sure knowledge in this field. 
   总的来说，彗星的冰物质可能不是地球上水的主要来源。但在该领域，目前尚很少有肯定的认识。
2. A mixture of meteoritic water and cometary water would not work either because this combination would still contain a higher concentration of deuterium than is found in the oceans. 
   陨星水和彗星水的混合也不可能提供地球上的全部水源，因为这种混合水与现在的海水相比，仍然有着较高的氖含量。
3. .. The breakup of the comet's nucleus releases the fresh material, which everybody in cometary science wants to study," said Hermann Boehnhardt of the European Southern Observatory, who wrote a commentary accompanying the Science research. 
   他说：“慧星是星系的建筑石。我们仍可以观察到它们几乎最原始的状态。慧星核心爆炸释放出新的物质，这是每个从事慧星科学研究的人都梦寐以求的。”

查看更多例句 相关情景会话

• 1. 彗星的
  comet 彗星...cometary 彗星的...comether 引诱
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• 2. 彗星的，彗星似的
  881 comet n. 彗星...882 cometary adj. 彗星的，彗星似的...883 comic adj. 滑稽的，好笑的；喜剧的
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