The optical structure and design demands relate to the optical system of avionic HMS/HMD are described in detail in this paper.A parabolic visor projectile display is selected as a final scheme.是什么意思_The optical structure and design demands relate to the optical system of avionic HMS/HMD are described in detail in this paper.A parabolic visor projectile display is selected as a final scheme.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句