改写：Another example is when there is evidence of one BAL or a portion of a BAL strengthening while another weakens within the same quasar This can be easily explained in the transiting scenario as clou

An additional illustration occurs when there is proof of one BAL, or a fragment of a BAL, strengthening while another diminishes within the identical quasar. This phenomenon can be readily clarified in the transiting situation, where clouds traveling at varying speeds can enter or exit our field of view at different intervals, as expounded upon by Capellupo (2012).