Absorption-derived [O I]_63 μm-to-[C II]_158 μm and [O I]_145 μm-to-[C II]_158 μm line luminosity ratios as a function of metallicity and redshift. The color and symbol notation follow Fig. 3. The black solid lines and the grey-shaded regions show the weighted means and the associated 1- and 2-sigma uncertainty of each line ratio. Similar to Fig. 4 the local samples are shown as upper limits and are in fine agreement with the absorption-derived line luminosity ratios for both transitions in the GRB observations. Similarly to the absorption-derived [O I]_63 μm-to-H I conversion factor, the simulation suggests a systematical displacement in the absorption-derived [O I]_63 μm-to-[C II]_158 μm line luminosity.