the velocity difference between him and me.

造成了我们的速度差
So, in early stages, he is the one undergoing acceleration and not me.

所以在开始时他有加速度我没有
Likewise, the twin went somewhere and

同样的如果我的兄弟去了某地
stopped and turned around and came back.

并停留一段时间然后调头回来
The twin is suffering the deceleration.

那他就有减速度
So, there are two periods at least, during the voyage,

所以在这趟旅行中至少有两个时间段
when the twin has no right to claim that he is not moving, that I am.

我兄弟无法宣称他没在移动而我在移动
That's why we don't have the same status.

这是我们状况不同的原因
Whereas for me, the whole time Newton's laws

但是对我来说牛顿定律
and the laws of inertia were operating for me,

和惯性定律一直在对我起作用
whereas for him and the rocket during takeoff,

但对于他和火箭而言在起飞过程中
things started flying off and during landing things started flying off.

东西开始反向飞行降落过程也是这样