横向
1
Deep narrow valley with steep sides
3
Large natural stream of water
4
Half of the Earth
9
Distance east or west of prime meridian
10
Flat grassland in tropical regions
纵向
2
Imaginary line around the middle of Earth
5
Mountain that can erupt with lava
6
Where river meets the sea
7
Low-lying land surrounded by higher ground
8
Height above sea level
11
Chain or group of islands