英语词汇“ring vaccinations”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	ring vaccinations
释义	ring vaccinations 原型:ring vaccinations 是 ring vaccination 的复数 ring vaccination 大范围接种；包围接种(在出现天花或类似传染病时对有关人进行防疫接种)
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