How to deal with the turbulent convection motion in stars is a very important problem in the theory of stellar structure and evolution.
如何处理恒星中的对流运动，是恒星结构和演化理论中一个极为重要的问题。
The star rotation is a difficult problem in the theory of the stellar structure and evolution.
恒星的自转，是恒星结构和演化理论的难点。
The theory of stellar structure and evolution concerns the various physical processes inside stars.
恒星结构和演化理论是研究恒星内部的物理过程、结构和恒星如何演化的科学。
As a non-ideal effect, magnetohydrodynamics is not considered in the stellar structure and evolution.
在恒星结构和演化模型中，磁流体动力学过程作为一个非理想效应并没有被考虑。
Between the theories of big-bang cosmology and the theory of stellar structure and theory, there is a gap still rarely understood: how do the galaxies form?
然而在大爆炸宇宙模型和恒星演化理论之间存在一个人们了解甚少的领域：就是由大量恒星组成而又作为宇宙基本单元的星系是如何形成和演化的?。
Between the theories of big-bang cosmology and the theory of stellar structure and theory, there is a gap still rarely understood: how do the galaxies form?
然而在大爆炸宇宙模型和恒星演化理论之间存在一个人们了解甚少的领域：就是由大量恒星组成而又作为宇宙基本单元的星系是如何形成和演化的?。
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