| 词汇 | Keyhole Nebula |
| 释义 | Definition of Keyhole Nebula in English:Keyhole Nebulanoun Astronomy
OriginLate 19th century; earliest use found in The Eclectic Magazine. Definition of Keyhole Nebula in US English:Keyhole Nebulanoun Astronomy
OriginLate 19th century; earliest use found in The Eclectic Magazine. |
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