横向
1
Body of water surrounded by land
4
Land surrounded by water
5
Landform where river meets the sea
6
Largest river in South America
10
Large area covered with trees
14
Wearing away of land by water or wind
纵向
2
Line dividing two countries
3
Largest hot desert in the world
7
Large natural elevation of earth
8
Low-lying land surrounded by higher ground
9
Long-term weather patterns of an area
11
Largest ocean on Earth
12
Cold treeless Arctic plain
13
Piece of land jutting into the sea
15
Half of the Earth