We have collected one-dimensional raster-scan observations of the active star-forming region Sharpless 171 (S171), a typical H ii region-molecular cloud complex, with the three spectrometers (LWS, SWS, and PHT-S) on board ISO. We have detected 8 far-infrared fine-structure lines, [O iii] 52 µm, [N iii] 57 µm, [O i] 63 µm, [O iii] 88 µm, [N ii] 122 µm, [O i] 146 µm, [C ii] 158 µm, and [Si ii] 35...
