单词	Oort cloud
释义	Oort cloud noun ˈȯrt-  : a spherical shell of cometary bodies believed to surround the sun far beyond the orbits of the outermost planets and from which some are dislodged when perturbed to fall toward the sun compare kuiper belt Word History Etymology Jan Oort †1992 Dutch astronomer First Known Use 1974, in the meaning defined above
随便看	peu peu de chose peu à peu Peucedanum peuhl Peul Peumus Pevsner pevy pew pew chair pew rent pewage pewdom rig-veda Riga Riga fir riga pine Riga, Gulf of rigadoon rigadoons rigae rigamajig rigamarole rigamaroles

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