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英语阅读Life on Mars火星生命

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英语阅读Life on Mars火星生命
  Scientists have discovered new things about the atmosphere1 and environment on Mars. They found a “toxic cocktail” of chemicals that would easily kill any living organism2. The chemicals have been found on the surface of the Red Planet. The scientists, from Edinburgh University in the UK, say the discovery of the chemicals means the chance of finding life on Mars has fallen. The scientists are astrobiologists3—they study the atmosphere and environments in the universe that might support life. The researchers said Mars had no ozone4 layer, which means there are high levels of ultra-violet5 (UV) radiation6. The mix of UV radiation and the chemicals will kill the lives on Mars.
      科学家们有了关于火星大气和环境的新发现。他们发现了一种“有毒的混合物”,这种化学物质能轻易杀死一切生物。在这颗红色星球的表面已经发现了这类化学物质。来自英国爱丁堡大学的科学家们表示,这类化学物质的发现意味着在火星上存在生命的可能性大大降低。这些科学家是天体生物学家,他们研究宇宙中能维持生命存在的大气和环境。研究人员说,火星没有臭氧层,这意味着紫外线(UV)的辐射水平很高。紫外线辐射和化学物质会杀死火星上的任何生命。


      The scientists tested what happens when the chemicals found on Mars mix with UV radiation. They found it killed organisms very quickly. The chemicals alone were enough to kill living organisms. However, when the chemicals were mixed with UV rays, the mix killed organisms 11 times faster. The scientists said, “Our observations show that the surface of present-day Mars is highly harmful to cells, caused by a toxic cocktail of chemicals and UV radiation.” They added that their research was further evidence that the surface of Mars is deadly to any form of plant life. They say the chemicals and UV rays make“much of the surface and near-surface regions uninhabitable7”.
      科学家们测试了把在火星上发现的化学物质和紫外线辐射混合的时候所发生的情况。他们发现这会很快杀死生物。仅这些化学物质就足以杀死活着的生物。然而,当这些化学物质和紫外线混合作用时,杀死生物的速度快了11倍。科学家们说:“我们的观察表明,有毒的化学物质和紫外线辐射导致现今火星的表面会对细胞会造成极大的伤害。”他们补充说,他们的研究进一步证明了火星表面对任何类型的植物都是致命的。他们说,那些化学物质和紫外线使“火星大部分地表和近地表的区域不适宜居住”。
      Notes:
      1. atmosphere  n. 气氛;大气;空气
      2. organism  n. 有机体;生物体;微生物
      3. astrobiologist  n. 天体生物学者,太空生物学者
      4. ozone  n. [化学] 臭氧;新鲜的空气
      5. ultra-violet  n. 紫外线
      6. radiation  n. 辐射;发光;放射物
      7. uninhabitable  adj. 不适宜居住的

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