In physics, a light field describes the direction of all the idealised light rays passing through an area.
在物理学中，光场描述的是理想状态下光线辐射穿过一个地区。
2
Reasonable positions are chosen according to the amount and direction of curly light rays so that influence of the ray curvature is avoid.
根据测量光线的弯曲偏移量和偏移方向，合理安排测量工位，避免了光线弯曲对测量结果带来的影响。
3
Lastly, beyond and above the plateau, in a northwesterly direction and at a distance of at least seven miles, glittered a white summit which reflected the sun's rays.