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随着时间的推移，卫星失去了推进速度，使得地球对卫星的拉力大于把卫星推离地球的力。
As time goes by, the satellite loses its speed, which makes the force pulling it towards the earth stronger than the force pulling it away.
如果拥有这样的推进速度，新天空母舰会是什么模样？
What thrust speed does this new Helicarrier look like it would have?
并进一步分析了基岩厚度、采高、推进速度对顶板破断的影响。
The effect of basic rock thickness, mining height and advancing speed on roof breaking is analyzed.
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