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1. Oxford Dictionary

   panspermia

   • IPA[panˈspəːmɪə]

   英式

   • n.
     the theory that life on the earth originated from microorganisms or chemical precursors of life present in outer space and able to initiate life on reaching a suitable environment.

   • noun: panspermia

2. • 更多解釋

   panspermia

   • IPA[panˈspərmēə]

   美式

   • n.
     the theory that life on the earth originated from microorganisms or chemical precursors of life ...

   Oxford American Dictionary