以下为句子列表：
英文: They calculate that the impact of a body 250 kilometers wide would have delivered energy equivalent to 100 billion megatons of TNT to the planet, melting exposed polar ice and injecting enough water into the atmosphere to rain out 16 meters of precipitati
中文: 研究人员推算，直径250公里的星体对火星的冲击能量相当于1000亿个百万吨黄色炸药，足以融化裸露的两极冰帽，将大量的水带入大气，造成16公尺的降雨量。
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