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 in advance预先准备
preparation completion准备完成
Preparation tectmology制备工艺
preparation - method制备方法
preparation techniques制备工艺
preparation employment预就业
preparation facilities调制设备
preparation experiment制备实验
preparation parameters制备参数
preparation technology制备工艺