preparation for为 ... 做的准备preparationn.准备；预备；配制preparation of Ca-based sorbent钙基脱硫剂制备Preparation of solid alcohol fuel固体醇燃料的制备preparation of radioactive sample放射性样品制取preparation of pesticide standards农药标准编写PREPARATION OF THE HAW ICE-CREAMPreparation of Nanon Copper Powder纳米级铜粉的制备preparation of the entangled state纠缠态制备preparation of sample with melting熔融制样preparation by magnetic separation磁选preparation of a distribution plan分配计划的编制