横向
1
Largest ocean on Earth
3
Largest river in South America
5
City that is seat of government
6
One of seven major landmasses
8
Large slow-moving mass of ice
9
Wearing away of land by water or wind
纵向
2
Long-term weather patterns of an area
3
Region surrounding the North Pole
4
Deep narrow valley with steep sides
7
Mountain that can erupt with lava
10
Half of the Earth