让我们假装是在沿轨道绕地球运转的宇宙飞船上！
Let 's pretend we're on the spaceship orbiting round the earth!
让我们假装是在沿轨道绕地球运转的宇宙飞船上！
Let's pretend we 're on the spaceship orbiting round the earth!
我们需要的是一个在赤道处地面上的非常高的塔，以及沿地球静止轨道绕地运转的卫星。
What we need is a really tall tower here on the ground right at the equator and a satellite in geostationary orbit.
彗星的后裔，即流星团，沿正常的轨道运行，与地球绕太阳运行的轨道相似。
The comets' offspring, the meteor swarms, travel in regular orbits, similar to the earth's orbit around the sun.
彗星的后裔，即流星团，沿正常的轨道运行，与地球绕太阳运行的轨道相似。
The comets' offspring, the meteor swarms, travel in regular orbits, similar to the earth's orbit around the sun.
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