这个时代推出的最大胆，最激动人心的关于重力控制的书之一。
One of the boldest and most exciting books on gravity control to be put forward in our times.
一旦地球经历了其形成的最后阶段，气体就会鼓泡到地表，并被地球的重力场控制，形成大气。
Once Earth had gone through the final stages of its formation, gases bubbled to the surface and were held by Earth's gravitational field to form the atmosphere.
宇航员们需要一台不停转动的巨大离心分离机给他们的控制舱提供人造重力。
A spinning centrifuge provides artificial gravity for the astronauts who man the ship.
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