俗话说“条条大路通罗马”，背诵
地理
insular
island
peninsula
islet
marine
maritime
moist
ledge
oasis
tide
ebb
continent
terrestrial
outskirt
region
endemic
cosmopolitan
subterrane
subterranean
cavern
flaw
cleft
crevice
gap
zone
equator
longitude
altitude
latitude
meridian
subsidiary
Antarctic
Antarctica
Arctic
coastland
hemisphere
contour
geography
horizon
lowland
plain
strait
channel
valley
volcano
plateau
basin
navigation
ranges
salinity
sediment
elevation
formation
geothermy
terrain
topography
tropical
tropics
temperate