kham-pha-vi-tri-dia-ly-va-tam-quan-trong-cua-chau-phi
vi-tri-dac-biet-tren-ban-cau
diem-cuc-nam-mui-hao-vong
sa-mac-sahara
rung-nhiet-doi-congo
cao-nguyen-va-day-nui-o-chau-phi
he-thong-song-lon-o-chau-phi
anh-huong-cua-vi-tri-dia-ly
da-dang-sinh-hoc-o-chau-phi