This force is not the universal gravity but electromagnetic force.

此引力并非万有引力，而是电磁力。

youdao

This implies that it is not possible that the centrifugal force is provided by the universal gravity.

这说明该向心力不可能是由万有引力提供的。

youdao

Unfortunately, there is no place, yet, for the fourth universal force, gravity.

遗憾的是，目前在表格中还没有第四种力，引力的位子。

youdao

Isaac Newton showed how a universal force, gravity, applied to all objects in all parts of the universe.

BBC: Children encouraged into science