河外星系

he2 wai4 xing1 xi4

extragalactic star system, galaxy (not including our Galaxy)

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河外星系

hé wài xīng xì

{天} anagalactic nebula; extragalactic system; extragalactic nebula; external galaxy

河外星系源 extragalactic source

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河外星系|河外星系 [hé wài xīng xì] ► extragalactic star system ► galaxy (not including our Galaxy)