Newton's laws of motion put an end to the idea of absolute position in space.

牛顿运动定律终结了空间绝对位置的观念。

First, the incremental optical encoder from earlier can't read out an absolute angular  position because the wheel has 48 equally spaced spokes, and it can't discern one angle from the  next.

首先， 早期的增量式光学编码器无法读出绝对角度位置， 因为车轮有 48 个等距辐条，并且无法区分一个角度和下一个角度。