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词汇
protogalaxy
释义
pro·to·gal·ax·y
AHD
[prōʹtō-găl'ək-sē]
D.J.
[ˈprəʊtəʊˌgæləksiː]
K.K.
[ˈprotoˌgæləksi]
n.
(名词)
pl.
pro.to.gal.ax.ies
A mass of hydrogen that is sufficient to form or is already beginning to form a galaxy.
原星系:一团足已形成或已开始形成星系的氢
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更新时间:2026/8/24 15:42:25