protogalaxies是protogalaxy的复数

protogalaxy

美

英

网络原星系

复数：protogalaxies

英英

网络释义

n.	1. a hypothetical cloud of gas believed to have been formed about 14 billion years ago from dark matter, neutral hydrogen, and helium, from which all the galaxies and stars evolved

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释义:

全部全部,原星系原星系

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来源:全部全部,字典字典,网络网络

难度:全部全部,简单简单,中等中等,难难

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1.

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。

www.transcn.org