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 manuscripts论文写作preparation of soil sample士样制备preparation for evaluation迎评Preparation of Tropic Acid托品酸的制备preparation for earthquake备震过程preparation and processing制备工艺preparation for start-up[化] 开车准备preparation of cyclohexene环己烯Preparation of Porous Glass千埃级微孔玻璃的制备preparation before the game赛前准备