![英语短文欣赏：Scientific American]( "英语短文欣赏：Scientific American")
- Forty-sixmillionyearsago,northwestMontanawasatropicalforestofgiantferns,conifersandginkgos.Tinyprimateslivedthere,asdidrhinosandhorsesandcrocs.Alongwithsomelesscharismaticcreatures:mosquitoes.Oneofthosemillionsofmosquitoeswasthenblownontothesurfaceof...
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