星系化学演化也是天文学者一直关心的问题。
The chemical evolution of galaxies is a long-interesting problem for astrophysicist.
钡星对于重元素核合成及星系化学演化的研究都有非常重要的意义。
It is very significant to Ba stars for heavy-element nucleosynthesis and Galactic chemical evolution.
神召教授的发现为物空相对论理论的星系演化学说间接提供了观测依据。
God called the discovery of material empty Professor relativity theory, theory of galaxy evolution based on the observation indirectly.
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