关于这张图
There are several different surface textures in the South Polar ice. The surface in this image with the round/semi round depressions is informally called swiss cheese. Orbit Number: 74312 Latitude: -86.9779 Longitude: 29.0233 Instrument: VIS Captured: 2018-09-15 02:05 https://photojournal.jpl.nasa.gov/catalog/PIA22799
