横向
1
Largest ocean on Earth
5
Land surrounded by water
7
Seasonal heavy rainfall
8
Imaginary line around the middle of Earth
9
Area where water covers the soil
纵向
2
Raised area of land, smaller than a mountain
3
One of seven major landmasses
4
Landform where river meets the sea
6
Flat grassland in tropical regions
10
Large area covered with trees
11
Region near the equator
12
Ridge of rock or coral near the surface