Does the subject want to ask, "In the voice of swallows, what does acacia mean for another year?"? Missing caused by the sound of swallows flying. Among them, "I miss you for another year in the voice of swallows" expresses the poet's yearning for the sound of swallows flying. The meaning of the whole sentence can be understood as: in the season when swallows fly back, when they hear the chirping sound of swallows, the poet laments that one year has passed and the poet's lovesickness has not dissipated. This poem reflects that people often use natural scenery to express their inner thoughts and feelings of parting.