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【聆听❤声】燃烧仅在地球可行
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What is fire anyway? Well, fire is rapid oxidization. 1.……………（1个飘号，1个句号） Exactly, so without oxygen in the air, nothing burns. 2…………（1个问号） Yes. By roughly a billion years ago, simple forms of plant life called "eukaryotes" were already busily converting carbon dioxide into oxygen gas, just like their descendants do today. 3.………………（逗号、飘号、句号各一个） In fact, of all the planets, moons, asteroids, and comets in our solar system, the only place where you can actually start a fire is right here on earth. And even here, it's only been possible relatively recently.
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