横向
1
Ocean between Americas and Europe/Africa
5
Raised area of land, smaller than a mountain
6
Ridge of rock or coral near the surface
8
Total number of people in an area
9
Deep narrow valley with steep sides
10
Large body of water partly enclosed by land
11
Wearing away of land by water or wind
13
Vast body of salt water
纵向
2
Land surrounded by water
3
Large area covered with trees
4
Distance east or west of prime meridian
7
One of seven major landmasses
12
Low-lying land surrounded by higher ground