The first says that the laws of physics are the same in all inertial reference frames.

第一个说物理定律在所有惯性参考系中都是相同的。

We call this factor gamma, and it applies to any situation where another inertial reference frame is moving relative to yours.

我们将此称为伽马因子，它适用于另一个惯性参考系相对于您移动的任何情况。