Same as Fig. 3 but toward G19.61–0.12 and G32.80+0.19. The shaded areas indicate velocity intervals of specific spiral arms (Aquila-Rift in green, Sagittarius-Carina arm in magenta, Scutum-Centaurus arm in blue, inter-arm gas in orange, the GC/bar in yellow), and the molecular cloud envelope or unidentified foreground clouds in brown. Toward G32.80+0.19, the insert in the HCN panel zooms in on the HCN absorption features on top of the emission within a velocity window between –10 and 30 km s^–1.