preparation act预备行为preparationn.准备；预备；配制Preparation of the buckwheat icecream苦荞冰淇淋的研制preparation and determination methods制备和检测Preparation of new hydrophobic silica新型疏水二氧化硅的制备Preparation of sheep placenta peptide羊胎盘肽的研制preparation works before construction施工准备工作preparation of cash distribution plan现金分配计划的编制Preparation of fermented meaty flavor发酵型肉味香精的研制Preparation of Distinctive Ice Creams特色冰淇淋的研制Preparation of matting polyester film亚光聚酯薄膜的制备preparations for railway construction铁路筹建