单词	pyran
释义	pyran noun py·​ran ˈpī-ˌran  : either of two cyclic compounds C5H6O that contain five carbon atoms and one oxygen atom in the ring Word History Etymology International Scientific Vocabulary First Known Use 1904, in the meaning defined above Medical Definition pyran noun py·​ran ˈpī(ə)r-ˌan  : either of two cyclic compounds C5H6O that contain five carbon atoms and one oxygen atom in the ring
随便看	pole of cold pole of inaccessibility pole of the heavens pole piece pole pitch pole plate pole position pole pruner pole riding pole rot pole screen pole seine pole shoe pole step pole stock pole strength pole strip pole sweat pole switching pole tie pole trailer pole transformer pole trap pole trawl pole vault

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