Chemical reactions are the basis of chemical evolution.
无处不在的化学反应是化学进化的基础。
The chemical evolution of galaxies is a long-interesting problem for astrophysicist.
星系化学演化也是天文学者一直关心的问题。
It is very significant to Ba stars for heavy-element nucleosynthesis and Galactic chemical evolution.
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。
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