translation.en: Comets contain the original material from which our solar system was formed, so they're ideal to study the components that were present at the time when Earth, and life, started.
translation.zh: 彗星中含有来自太阳系 形成时的原始物质， 因此它们是用来研究 地球和生命起源时 所出现的成份的理想对象。