单词 | polio vaccination |
释义 | polio vaccination First she avoided a polio vaccination at school. The Sun He considers all possibilities, and rejects totally the early suggestion that mass polio vaccination campaigns first spread the virus. The Times Literary Supplement Polio vaccination was not required for pilgrims. Globe and Mail It's a film with a serious message about polio vaccination. Retrieved from Wikipedia CC BY-SA 3.0 |
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