hemorrhagic disease短语¹³¹⁶²⁰⁺³ 基本例句 出血性疾病 Researchers are engaging in studying of Rabbit Hemorrhagic Disease RHD new type vaccine due to the cost, biology safety and animal welfare of RHD tissue inactivated vaccine. 由于兔病毒性出血症 RHD组织灭活苗涉及的成本、生物安全及动物福利等问题，国内外学者正致力于 RHD新型疫苗的研制和开发。 cnki