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
不断变动的，不过通常约1000K，使得氢原子平均的速为
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.
地球外气层底的不断变动的，不过通常约1000K，使得氢原子平均的速为秒5公里。
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