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 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 Porous Glass千埃级微孔玻璃的制备