短語詞組短語Preparation E method 制作步驟genome DNA preparation method 基因組DNA分子提取land preparation method 整地方式catalyst preparation method 催化劑制備方法site preparation method 整地方法novel preparation method 制備新方法chromosome preparation method 染色躰制備方法Level Preparation Method 預習指導法chemical preparation method 化學制備方法 返回 preparation method