After about an hour of being beyond the pull of Earth's gravity, Glenn reported he felt fine.

VOA: special.2009.06.17

But gravity has a remarkable property that the pull of the Earth is itself proportional to the inertia of the object.

重力有一个显著特征,即地球的引力,与物体的质量成比例

耶鲁公开课 - 基础物理课程节选

You cannot tell the mass, because what you are doing now is appealing to the notion of mass as something that's related to the pull of the Earth on the object.

你无法测出质量,因为你现在所做的是把质量,用地球对物体的引力给替代了

耶鲁公开课 - 基础物理课程节选

If you escape the pull of gravity, your spaceship will be off, won't be orbiting the Earth.

如果你完全脱离重力,太空船早就飞得没影了,而不是在轨道上运行

耶鲁公开课 - 基础物理课程节选

It's not talking about the gravitational pull of the Earth on an object.

没提到地球对物体的引力

耶鲁公开课 - 基础物理课程节选