静止与运动

旁白 neutral

After a time, if the rate of turning is the same, the man seems to himself to be at rest

过了一会儿，如果旋转的速度保持不变，这个人会觉得自己是静止的（并没有在运动）。

旁白 neutral

He is like all the men and women on the earth

他就像地球上所有的男男女女一样。

旁白 neutral

We are all turning round all the time with the earth, but we seem to ourselves to be at rest

我们都一直随着地球转动，但我们都觉得自己是静止的。

旁白 neutral

We have no feeling that we are in motion

我们感觉不到自己在运动。

旁白 neutral

This is because the rate of turning is the same

这是因为旋转的速度始终不变。

旁白 neutral

The man is in motion. He seems to himself to be at rest

这个人其实在运动，但他觉得自己是静止的。

旁白 neutral

Here are three boys and a dog

这里有三个男孩和一只狗。

旁白 neutral

Two of the boys are taking a rest

其中两个男孩在休息。

旁白 neutral

They are resting on their beds

他们正躺在各自的床上休息。

旁白 neutral

The other boy and the dog are in motion

另一个男孩和那只狗在运动。

旁白 neutral

Now, put a stop to the motion of the seat

现在，让座椅停止转动。

旁白 neutral

When you do that the seat is at rest. The man is not in motion

这样一来，座椅就静止了，这个人也不在运动了。

旁白 neutral

But he has a feeling that he is turning round and round

但他有一种自己还在不停打转的感觉。

旁白 neutral

This is a picture of his feelings

这就是他内心感觉的一幅图。

旁白 neutral

He is not turning round. But he seems to himself to be turning round

他其实没有在转，但他觉得自己在转。

旁白 neutral

And everything round him seems to be turning round. Why is this?

而且他周围的一切好像都在旋转。这是为什么呢？

旁白 neutral

It is because change in our motion is the cause of our feelings of motion

这是因为，我们运动的变化才是我们产生运动感觉的原因。

旁白 neutral

Through our sense of motion we get knowledge of changes in the rate and direction of our motion

通过我们的运动感，我们得以知道自己运动速度和方向的变化。