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.

他谈到了柱状考框架以及他是如何认为该框架是解大脑的关键之一。

This reference frame is not an inertial reference frame.

个考系不是惯性考系。

'Down' is an illusion of your reference frame.

“向下”是你的照系的错觉。

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

嘿，我没有超速——在我的惯性考系中。

To  earth's reference frame, gravity just pulls in.

对于考系，重力只是吸引。

Time in that moving reference frame will seem to equal time in your reference frame, multiplied by gamma.

个移动考系中的时间似乎等于考系中的时间乘以伽马。

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，她输入的考系与开始时的考系不同。

In this reference frame this  block accelerates without a net, external force.

在个考系中，个块体在没有净外力的情况下加速。

So time is slower in that moving reference frame.

因此，在那个移动的考系中时间变慢了。

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

好吧，我们声明我们正在使用的考系。

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考系（也称为考系）来做到一点。

Light always moves at the speed of light, though, no matter what your reference frame is.

无论您的考系如何，光总是以光速移动。

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

第一个说物定律在所有惯性考系中都是相同的。

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

一定是真的，因为没有真正的方法来区分考系。

Again, this is not an inertial reference frame, therefore, Newton's First Law does not hold true in this reference frame.

再者， 不是一个惯性考系，因此， 牛顿第一定律在个考系中不成立。

You know, you can have two events that happen and two different people looking at it from two different what we call reference frames.

可以有两个事件发生两个不同的人身上、他们从两个不同的照系来观察它。

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考系相对于您移动的任何情况。

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

但是当斯特拉改变她的返程方向时，她进入了一个与她开始时不同的照系。