The First Order Weakly- guiding Approximation for the Eigenvalue Equation of Hybrid Modes in a Step- index Optical Fiber是什么意思_The First Order Weakly- guiding Approximation for the Eigenvalue Equation of Hybrid Modes in a Step- index Optical Fiber在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句