横向
1
Dry land with little rainfall
4
Imaginary line around the middle of Earth
6
One of seven major landmasses
8
Goods brought in from another country
9
Large body of water partly enclosed by land
11
Raised area of land, smaller than a mountain
13
Deep narrow valley with steep sides
纵向
2
Region near the equator
3
Wearing away of land by water or wind
5
Area where water covers the soil
7
Half of the Earth
10
Steep rock face at edge of land
12
Flat grassland in tropical regions
14
Largest hot desert in the world
15
Seasonal heavy rainfall