1.meridian经线;
2. parallel纬线;
3. latitude纬度;
4. longitude经度;
5. time zone时区;
6. altitude海拔;
7. horizon地平线;
8. sea level海平面;
9. plain平原;
10. lowland低地;
11. basin盆地;
12. slope坡地;
13. cavern洞穴;
14.valley山谷/溪谷;
15. canyon峡谷。
1.meridian经线;
2. parallel纬线;
3. latitude纬度;
4. longitude经度;
5. time zone时区;
6. altitude海拔;
7. horizon地平线;
8. sea level海平面;
9. plain平原;
10. lowland低地;
11. basin盆地;
12. slope坡地;
13. cavern洞穴;
14.valley山谷/溪谷;
15. canyon峡谷。