fringe e conditions 边界条件
The authors show that using the half-wave strip method to deduce the bright and dark fringe conditions of Fraunhofer grating diffraction is simpler than the amplitude vector method.
本文用半波带法对夫琅禾费光栅衍射进行分析该方法和常用的振幅矢量法相比，分析衍射条纹的位置更要快捷，明了。
Most migrant workers live in simple rental housing in the urban fringe, "city Villages" with poor living conditions and poor social public order.
因此，农民工多居住于城乡结合部、“城中村”等简陋的出租房中，居住条件差，社会治安不好。
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