| 单词 | retrovaccination | 
| 释义 | Definition of retrovaccination in English:retrovaccinationnoun ˌrɛtrəʊˌvaksɪˈneɪʃn Medicine historical 
 OriginMid 19th century. From retro- + vaccination. Compare retrovaccinate. Definition of retrovaccination in US English:retrovaccinationnounˌrɛtrəʊˌvaksɪˈneɪʃn Medicine historical 
 OriginMid 19th century. From retro- + vaccination. Compare retrovaccinate.  | 
	
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