毫米

1. 水晶石石英断片，直径4到64毫米（0。16到2。51英寸），尤指天然圆形的石英颗粒
   A rock fragment between4 and64 millimeters(0.16 and2.51 inches) in diameter, especially one that has been naturally rounded.
2. 光度视网膜亮度单位，相当于每平方米有一烛光亮度的表面，通过一平方毫米的瞳孔区域，到达视网膜的光线数量
   A unit of retinal illumination, equal to the amount of light that reaches the retina through 1 square millimeter of pupil area from a surface having a brightness of 1 candela per square meter.
3. 这边缘必须切割到0.02毫米的精密度。
   The edge must be machined to 0.02 millimeters.

毫的英语翻译：

米的英语翻译：