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[求助] 求大神翻译，希望能详细解释~

求翻译下面文段，希望能给出通俗易懂的的解释，谢了~
In the ﬁrst case, structural isolation of a Group-V atom in its 5+ oxidation state, e.g., Sb5+ , within a Cu-rich matrix leads to a narrow Group-V-derived s-orbital band at the conduction band minimum (CBM). In combination with a narrow Cu d band at the valence band maximum (VBM), a high joint density of states and a high absorption coefﬁcient ensue. In the second case, if the Group-V atom exists in the lower 3+ oxidation state, e.g., Sb3+ , it adopts an ns2 valence electron conﬁguration. In this 3+ oxidation state, highly asymmetric coordination environments can lead to long distances between the Group-V atoms, resulting in ﬂat bands and attendant high joint densities of states.

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