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单词
protogalaxy
释义
pro·to·gal·ax·y
(pr
ō
t
ō
-g
ă
l
′
ə
k-s
ē
)
n.
pl.
pro·to·gal·ax·ies
A cloud of gas, primarily hydrogen, that is forming a galaxy or has sufficient mass to eventually form a galaxy.
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更新时间:2025/3/28 8:12:47