Unlike other objects, the speed of light is always constant regardless of an observer's reference frame.

与其他物体不同，无论观察者的参考系如何，光速始终是恒定的。

He talks about columnar reference frames and how he thinks that's one of the keys to understanding the brain.

他谈到了柱状参考框架以及他是如何认为该框架是理解大脑的关键之一。

Hey, I wasn't speeding—in my inertial reference frame.

嘿，我没有超速——在我的惯性参考系中。

This would mean the earth is moving relative to an absolute reference frame.

这意味着地球正在相对于绝对参考系移动。

Well, we state the reference frame we're using.

好吧，我们声明我们正在使用的参考系。

Excuse me. If you were riding on the olive, you'd be in a non - inertial reference frame and would...Are you okay?

抱歉，如果你坐在那颗橄榄上，你就是一个非惯性参照系并会… … 你没事吧？

But when Stella changed her direction for the return journey, she entered a different reference frame from the one she'd started in.

但当史黛拉改变方向返程时，她输入的参考系与开始时的参考系不同。

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。

This has to be true, because there's no real way to distinguish between reference frames.

这一定是真的，因为没有真正的方法来区分参考系。

We do this by using units and frames of reference, which are also called reference frames.

我们通过使用单位和参考系（也称为参考系）来做到这一点。