If rectangle and media have different aspect ratios, distortion will occur.
如果矩形和媒体的外观比例不同，则会发生扭曲的现象。
The normalized birefringence and modal dispersion as functions of normalized frequency for different aspect ratios are presented and compared with Guassian approximation.
文章比较了多模光纤和塑料光纤的结构参数和模式数量，并对大量的模式色散会严重限制光纤的带宽作了分析。
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