And optics require high-precision lenses with tighttolerance: Light is not a forgiving medium – think how even a slight ripple is noticeable in a glass.
和光学要求高精度镜头公差：光不是一个宽容的媒体 - 想怎么连一个微小的波动是明显的，在一个玻璃。
2
Introduce the problems of uncertainty in assembly or motion of tighttolerance, the importance of compliant motion, fine motion planning, and compliant motion planning.
介绍在装配或运动公差中的不确定性问题，介绍顺应运动、精细运动规划和顺应运动规划的重要性。
3
The float voltage applied to the battery is held to a tight 0.8% tolerance, and charge current is programmable using an external resistor to ground.