protogalaxies

美 　英

• 網(wǎng)絡原星系

詞形變化

復數(shù)：protogalaxies  

英漢解釋

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

例句

During the next five billion years, these protogalaxies continued condensing, forming galaxies in which stars were being born.

接下來的五十億年間，這些原星系持續(xù)凝縮，形成了誕生星球的銀河系。