Title: Is the composition of the Solar atmosphere unusual, and if so, why? Possible interpretations Show Chinese title

Title: 太阳大气的组成是否特殊，如果是，为什么？ 可能的解释

Abstract: The ongoing discussion about the atomic chemical composition of the Sun is commented on. The main focus in this review is on the deviation of the solar composition from that of most other solar-type stars in that its ratio of volatiles (like the elements C, N, O, S, P and Zn) to the refractories (most metals, like Ba, Ca, Ti, Y, Al, Sc and Zr) tends to be higher in the Sun by 10 to 20%. What does this tell about the formation and evolution of the Solar System? Scenarios in terms of galactic evolution, formation of the pre-solar nebula, of the evolution of the protoplanetary disk, of the engulfing of planets, and of other processes within the Solar System are considered, as well as the evolution of binary stars with similarly different chemical composition. Finally, implications, if any, on the habitability of the Solar System are commented on. Show Chinese abstract

Abstract: 关于太阳原子化学组成的持续讨论被评论了。 本综述的主要重点在于太阳组成与其他大多数太阳型恒星组成的差异，即太阳中挥发性元素（如元素C、N、O、S、P和Zn）与难熔元素（大多数金属，如Ba、Ca、Ti、Y、Al、Sc和Zr）的比值比其他恒星高10%到20%。 这能说明太阳系的形成和演化情况如何？ 考虑了银河系演化、前太阳星云的形成、原行星盘的演化、行星的吞噬以及太阳系内的其他过程，以及具有类似不同化学组成的双星的演化。 最后，对太阳系适居性可能产生的影响进行了评论。