“Keyhole Nebula”的概念、定义、翻译、参考文献-科学参考

单词	Keyhole Nebula
释义	Keyhole Nebula Encyclopedia 理学暗星云释 Keyhole Nebula锁眼星云位于明亮的船底座η星云（NGC3372）中心的暗星云，其形状类似锁眼而得名。 Astronomy Keyhole Nebula钥匙孔星云
随便看	point of self-tangency point of semicontinuity point of sight point of spectrum point of striction point of strong convexity point of subjective equality point of support point of symmetry point of tangency point of termination point of triangulation point of uniform convergence point of view pointolite point-open game point open topology point pair point particle point partitioning Point Pelee National Park point picking point-plane distance point probability point process

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