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.
地球外气层底的温度是
断变动的，过通常约是1000K，使得氢原子平均的速度为
秒5公里。
层底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.
地球外气层底的温度是断变动的，过通常约是1000K，使得氢原子平均的速度为秒5公里。
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