optical crystal的用法和樣例：
例句
- CaF2 is an important optical crystal, which has been extensively used in modem weapon.However, it is easy to crack when processing CaF2 components.
摘要氟化鈣是重要的光學晶體，在現代武器裝備上被廣泛應用，但氟化鈣零件加工中存在易解理的問題。 - Photoelectronic and photorefractive nonlinear optical crystals, Such as Photorefractive properties, nonlinear optics, Roman spectra and Luminescence spectra.
光電及光折變非線性光學晶體材料性能研究。
