High birefringence and large walkoff parameter can be obtained by a moderate increase in the central defect hole in the core region and the cladding elliptical hole area and ellipticity.是什么意思_High birefringence and large walkoff parameter can be obtained by a moderate increase in the central defect hole in the core region and the cladding elliptical hole area and ellipticity.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句