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
不断变动的，不过通常
1000K，
得氢原子平均的速度为
秒5公里。
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不断变动的，不过通常1000K，得氢原子平均的速度为秒5公里。
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