cross immunization 交叉免疫
cross immunization protection in rabbit 兔体交互免疫试验
immunization and cross-protection test 免疫交叉保护试验
Sudan convened earlier this month nine neighbouring countries to discuss cross-border immunization coordination.
苏丹在本月早些时候与9个邻国举行会议讨论跨界免疫协调工作。
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