But it's not a big con, because you can set up experiments in free space far from everything, where objects will, in fact, maintain their velocity forever.

但这并不是个反例,因为你可以在一个远离一切的空间里做实验,在那里,物体可以永远保持现有速度

耶鲁公开课 - 基础物理课程节选

You can anchor things to objects in outer space.

你能将一些东西固定在外太空中的物体上

耶鲁公开课 - 基础物理课程节选