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单词 spiral arm
释义

spiral arm

English

Noun

spiral arm (plural spiral arms)

  1. (astronomy) A section of a spiral galaxy that coils out from the centre.
    • 1979, Douglas Adams, The Hitchhiker's Guide to the Galaxy
      Far out in the uncharted backwaters of the unfashionable end of the western spiral arm of the Galaxy lies a small unregarded yellow sun.
    • 2008, BioWare, Mass Effect, Redwood City: Electronic Arts, →ISBN, OCLC 246633669, PC, scene: Mass Relays Codex entry:
      Primary mass relays can propel ships thousands of light years, often from one spiral arm of the galaxy to another.
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