The temperature at Earth's exobase oscillates but is typically about 1,000 kelvins, implying that hydrogen atoms have an average speed of five kilometers per second.
地球外气层底
温度是
断变动，
通常约是1000K，使得氢
子平均速度为
5
里。
子The temperature at Earth's exobase oscillates but is typically about 1,000 kelvins, implying that hydrogen atoms have an average speed of five kilometers per second.
地球外气层底温度是断变动，通常约是1000K，使得氢子平均速度为5里。
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