英文關鍵字
axis
continent
direction
earth
field
geography
geology
geomagnetic
global
globe
lines
magnet
magnetic
magnetism
magnetosphere
map
north
planet
pole
rotation
science
south
space
surface
world
英文關鍵字
axis
continent
direction
earth
field
geography
geology
geomagnetic
global
globe
lines
magnet
magnetic
magnetism
magnetosphere
map
north
planet
pole
rotation
science
south
space
surface
world