When the diffractive optical lens is illuminated by white light, its focal length not only relates to material dispersion and wavelength dispersion, but also to aperture factor.
在白光照射下，衍射光学透镜的焦距不仅同材料色散和波长色散有关，而且还同孔径因子有关。
For the same water depth and same aperture, the gas flow was the major factor for effecting the bubble size and velocity.
对于相同的水深和相同的孔径，流量是影响气泡大小和速度的主要因素。
The experimental results show that the loss factor and damp ratio decrease, the resonance frequency increases with increase of the aperture of the piston in the damper.
对阻尼器不同孔径进行了对比试验，试验结果表明：随着活塞孔径的增大，阻尼器的损耗因子和阻尼比减小，共振频率增加。
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