英文關鍵字
arctic
cave
crystal
environment
frost
frozen
geology
glacier
grotto
ice
icicle
icy
inside
kungur
light
melting
mountain
nature
russia
stalactite
stalagmite
stalagnate
tourism
ural
water
英文關鍵字
arctic
cave
crystal
environment
frost
frozen
geology
glacier
grotto
ice
icicle
icy
inside
kungur
light
melting
mountain
nature
russia
stalactite
stalagmite
stalagnate
tourism
ural
water