有了水，通电使水电解，得到的是氧气和氢气。
With water and electricity to make electricity and water solution, get the oxygen and hydrogen.
火箭发动机通常使飞行更快，但需要自携氧气。
A rocket engine typically goes faster but has to carry its own supply of oxygen.
火箭发动机通常使飞行更快，但需要自携氧气。
A rocket engine typically goes faster but has to carry its own supply of oxygen.
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