| 单词 | cowpox virus |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔vaccine〕A vaccine prepared from the cowpox virus and inoculated against smallpox.牛痘苗：从牛痘毒素提取的用来预防天花的疫苗美国传统The cowpox virus was used in the past to vaccinate humans against smallpox.牛痘病毒过去被用来为人类接种以预防天花。剑桥国际 |
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