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At first, Mars was being seen as viable option to go visit and live in but now Scottish astrobiologists have discovered that the planet is covered with bacteria killing minerals.
起初，火星被視作可以訪問并居住的星球，但現在蘇格蘭天體生物學家已經發現，火星上覆蓋著致細菌死亡的礦物。
Jennifer Wadsworth and Charles Cockell published in a study that there are salt minerals that kill bacteria within minutes.
華茲沃斯和克基爾發表了一項研究，稱火星上存在鹽礦物，可以在幾分鐘內殺死細菌。
Usually these minerals are only active at high heat, and since the planet is cold, scientists at first thought they were not a problem,
通常這些礦物只在高溫下活躍，因為火星是寒冷的，起初科學家認為是沒有問題的，
But these new scientists have learned that they can also be activated with ultraviolet light, which Mars has plenty of.
但這些科學家已經認識到，它們也可以被紫外線激活，而火星上存在大量紫外線。
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