preparationsn.准备，准备工作，配制剂（名词preparation的复数形式）preparationn.准备；预备；配制preparation concentrate精矿preparation for weaving织造准备preparation for a crime预备犯Preparation of Whiskers晶须的制备preparation temperature制备温度preparation of antibody抗体制备preparation of sections薄片的制备preparation for classes上课的准备； 备课preparation of catalyst催化剂制备preparation of shipbody船体号料