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学科
- Rocks[remove]23
- Mountains12
- Shrubs12
- Trees12
- Flowers10
- National parks & reserves5
- Valleys5
- Birds4
- Cities & towns4
- City on a rock4
- Cliffs4
- Clingmans dome4
- Cumberland mountains4
- Great smoky mountains (n.c. and tenn.)4
- Metropolitan museum of art (new york, n.y.)4
- Picture frames4
- Plaques4
- Tennessee river valley4
- Weeds4
- Forests3