因此，一些科学家推断，地球早期的大气与现在的不一样，主要由氢、甲烷和氨构成。
Therefore some scientists postulate that the Earth's earliest atmosphere, unlike that of today, was dominated by hydrogen, methane, and ammonia.
科学家们相信，这类太阳活动与地球磁场和高空大气层产生反应，对地球天气起着重要作用。
Scientists know that such solar activity plays a significant role on the weather we experience on Earth by interacting with our planet's magnetic fields and upper atmosphere.
科学家们相信，这类太阳活动与地球磁场和高空大气层产生反应，对地球天气起着重要作用。
Scientists know that such solar activity plays a significant role on the weather we experience on Earth by interacting with our planet's magnetic fields and upper atmosphere.
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