Physical properties of the PDR and shock components in 30 Doradus. The following three models are presented as examples: (1) low-P PDR with A_V = 2 mag, P∕k_B = 10⁵ K cm⁻³, and G_UV = 10³ (left), (2) high-P PDR with A_V = 10 mag, P∕k_B = 6.7 × 10⁸ K cm⁻³, and G_UV = 10⁴ (middle), and (3) shock with n_pre = 5 × 10⁴ cm⁻³, v_s = 8 km s⁻¹, and = 0 (right). For the two PDR models, several physical quantities (top: distance; middle: density and temperature; bottom: normalized emissivities of [C II] 158 μm, [C I] 370 μm, and [O I] 145 μm, as well as selected CO and H₂ transitions) are shown as a function of dust extinction. For the shock model, the distance (measured along the direction of propagation of the shock wave; top), as well as the density and temperature of the neutral fluid (bottom), are plotted as a function of flow time.