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

与其他物体不同，无论观察者的参考如何，光速始终恒定的。

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如何认为该框架理解大脑的关键之一。

This reference frame is not an inertial reference frame.

这个参考不参考。

'Down' is an illusion of your reference frame.

“向下”你的参照的错觉。

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

嘿，我没有超速——在我的参考。

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

对于地球参考，重力只吸引。

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

这个移动参考的时间似乎等于参考的时间乘以伽马。

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，你就一个非参照并会… … 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，她输入的参考与开始时的参考不同。

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

在这个参考，这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，在那个移动的参考时间变慢了。

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

好吧，我们声明我们正在使用的参考。

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（也称为参考）来做到这一点。

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

无论您的参考如何，光总以光速移动。

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

第一个说物理定律在所有参考都相同的。

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

这一定真的，因为没有真正的方法来区分参考。

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

再者， 这不一个参考，因此， 牛顿第一定律在这个参考不成立。

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、他们从两个不同的参照来观察它。

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，它适用于另一个参考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参照。