英语词汇“retrovaccination”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	retrovaccination
释义	ret·ro·vaccination \\|re.trō+, sometimes \|rē.trō+\ noun Etymology: retro- + vaccination : vaccination in which smallpox virus from human vesicles is used as seed virus in producing smallpox vaccine in cattle
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