We then used a quartz calcite, which has an effect on light that depends on the direction the light is propagating, to measure the direction as a function ofposition.
然后，我们用石英方解石测量作为位置函数的方向，石英方解石对光的影响这取决于光线的传播方向。
2
Recognition systems measure things like the size and positionof a nose, the distance between the eyes and the shape of cheekbones.
辨认系统测量的东西包括像鼻子的大小和位置，双眼之间的距离以及颧骨的形状。
3
Dirac pointed out that one of the only ways to measure a particle's position is by bouncing a photon off of it, and seeing where and how that photon lands on a detector.