Eleven point two kilometers per second, at which satellites can be freed from the gravitation of the earth, is called "escapespeed".
卫星以11.2千米每秒的速度前进可以脱离地球引力，这被称为“逃逸速度”。
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Escape velocity is simply the speed of an object that's shot out of a cannon the minimum initial speed so that the object could later escape Earth's gravity on its own.