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 of dyestuff染料制备preparation for polymer聚合物制备preparation of specimen制造样品,标本制备法preparation in quantity成批制备preparation improvement制备改进preparation for samples样品制备preparation-technique制备方法preparation for lessons上课的准备； 备课preparation for defence防御准备preparation of the soil整土