短語詞組短語defect -density 缺陷密度defect t density distribution 缺陷密度分佈defect t density 缺陷密度high defect -density region 高密度缺陷區(qū)defect density distribution 缺陷密度分佈Marco Defect Density 孔洞密度low defect density 低的缺陷密度density defect 密度缺點;密度結晶 返回 defect density