英文關鍵字
air
aircraft
airplane
area
areal
cloudscape
coastal
coastline
compound
crust
earth
flight
flying
foothills
forming
geomorphology
grains
ground
high
hillside
horizon
landform
landscape
magma
massmovement
minerals
mountains
mudstone
nature
ocean
outdoor
peak
petrology
rock
sandstone
sea
seaside
sedimentary
shale
side
siltstone
sky
stones
structure
surrounding
tectonic
top
travel
view
volcanism