Some scientists believe that comets hold the most primitive materials in the solar system and that they played a role in shaping some of the planets, as well as possibly seeding life on Earth.
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释义
一些科学家相信彗星拥有太阳系中最早的物质。此外,它们还有可能还在一些星球的形成上扮演了角色。也很可能在地球上播种了生命。
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