metal materials短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 金属材料 By using electroless plating process on the surfaces of non- metal materials, a new method of preparing nanoscale or microscale materials with hollow structure was investigated. 利用非金属表面化学镀工艺，研究了制备具有中空结构纳微材料的新方法。 fabiao