current application短语⁵²³⁸⁶ 基本例句 应用现状 In chapter one, the concept and the background of the research of photonic crystals are introduced. The current application and development prospects are also presented. 第二章主要介绍了一种类型的慢波结构,并对这种结构和光子晶体带隙结构的色散特性等进行了分析。 fabiao