characteristic gas特征气体characteristicn.特点；特性；特色adj.典型的；特有的characteristic of design documents成果特征characteristic indicating meanings表义特征characteristics of water resources水资源特征characteristic of the voltage drop压降特征characteristics of element content元素含量特征characteristics of Chinese culture中国文化特色Characteristic of capacity control功率调节特性characteristic industrial clusters特色产业集群characteristics of running journal办刊特点characteristic of the sound system音系特点

1. By means of transfer matrix method, we study the photonic bandgap properties of photonic crystals with two defects.
   摘要用特征矩阵法研究了带有双缺陷的一维光子晶体的禁带结构特性。