定义1：宇宙演化到复合期后形成的气体云团块，它们在引力作用下坍缩，进而演化为星系。
在类似于原星系里的高温等离子体介质中，热传导具有很高的效率。
Thermal conduction is very efficient in high temperature plasma of, for examPle, a protogalaxy.
迈耶博士从以往研究中发现宇宙早期与偶尔合并的大规模原星系相斥。
Dr Mayer knew from previous research that the early universe was awash with massive protogalaxies that would occasionally merge with each other.
橄榄石是一种镁铁硅酸盐，普遍存在于宇宙之中——远之星系，近之彗星。当然，珠宝店也不例外，其宝石级原石被称为贵橄榄石（peridot）。
Olivine is a magnesium iron silicate that exists throughout the universe — in distant galaxies and local comets — as well as in earthly jewelry stores, in a pristine, gem-quality form called peridot.
应用推荐