英文润色In this paper we will not distinguish BALs and mini-BALs with a width of 500–2000 km s−1 Hamann & Sabra 2004 because the absorption index of these two classes of absorption troughs present a conti

In this paper, we will not differentiate between BALs and mini-BALs that have a width of 500-2000 km s−1 (Hamann & Sabra 2004) since the absorption profile of these two categories of absorption troughs shows a continuous distribution (e.g. Trump et al. 2006, Ganguly & Brotherton 2008, Gibson et al. 2009). Additionally, there are instances where a source may transition from mini-BALs to BALs (e.g. Rodríguez Hidalgo et al. 2013).