hydral水合氯醛hydran.（希腊神话中的）九头蛇；难以根除之祸害；水螅Hydra.n.长蛇星座hydratidiform mole葡萄胎； 水泡状胎块hydration dynamics水化动力学hydrauhc structure水工结构Hydration activity水化活性hydrau-lic model水力模型hydration property水化性能hydrargyri benzoas[医] 苯甲酸汞hydraeroperitoneum水气腹hydralic supporter液压支架hydration retarder水化阻滞剂