月亮词典
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protogalaxies
原星系
常用释义
词性释义
原星系
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During
the
next
five
billion
years
,
these
protogalaxies
continued
condensing
,
forming
galaxies in
which
stars were
being
born
.
接下来的五十亿年间，这些原星系持续凝缩，形成了诞生星球的银河系。