hydrae难以根除的祸害,水螅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hydra-rib bearing流体预过盈轴承hydrajet fracturing水力喷射压裂hydrazinium sulfate硫酸肼hydrazine anhydrous无水肼hydration structure水化构造hydrazine ascorbate维丙肼(抗肿瘤药)hydrazine poisoning肼中毒hydragogue diuretic[医] 排水性利尿剂Hydralazine Sulfate硫酸肼苯哒嗪[抗高血压药]hydration interface水化界面