If a bay is inclined to the general line of the base at an angle of 10 mm in 24m, the error will be 0. 1 ppm . 如果一个尺段偏离基线总方向的角度相应于24米距离上的10毫米，则误差为0110-6。
Just about at the center of the retina is a small depression from 2.5 to 3 mm in diameter known as the yellow spot or macula . 大约正好在视网膜的中心，有一个直径为25到3毫米的小凹陷叫做黄斑。
the spectrograph uses a concave diffraction grating that provides a wavelength dispersion of 4. 2a°/mm in the first order. 光谱仪用了一块凹面衍射光栅，第一级光谱的色散度为42埃毫米。
The results from the pollen densitometers indicate the number of pollen grains sucked into a device per square millimeter of the aperture . 花粉显像密度计的计算结果，可以表明每一平方毫米孔径上吸入的花粉粒数。
Incipient shearing of main crop ore shows the development of hairline mylonitized shear zones that rapidly increase up to 2mm in width . 主茬矿石的初始的错动是呈毛发状的糜棱岩化剪切带，然后很快地增大到2毫米宽。
Twin 1200 mm and outfall to existing nullah 位于大沟渠旁边的雨水渠2 x 1200毫米
Hair on your head grows at 10 - 13mm per month . 13 你的头发每个月会长10至13毫米。
This is a 35 - millimeter film with 26 exposures 这是二十六张装的三十五毫米底片。
The rainfall there averages 300 mm a year 那儿的年降雨量平均每年为三百毫米。
The edge must be machined to 0 . 02 millimeters 这边缘必须切割到0 . 02毫米的精密度。
