📁 考古
The scientific study of material remains (such as artifacts and monuments) of past human life and activities. The archaeologist's objective is to gain an understanding of a culture or civilization by examining these objects and their use.
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条目 (3+)
Layers of the Earth's Atmosphere
http://www.windows2universe.org/earth/Atmosphere/layers.html
LLEK Bookmarks Scientific Search Engines - Anthropology
http://llek.de/english/thematic/social/frames/anthropologiefenster_e.htm