英文關鍵字
baikal
bank
biosphere
border
bottom
clean
ecotourism
forest
landscape
mountain
nature
rapids
reserve
river
rock
russia
siberia
spring
state
stone
temnik
water
英文關鍵字
baikal
bank
biosphere
border
bottom
clean
ecotourism
forest
landscape
mountain
nature
rapids
reserve
river
rock
russia
siberia
spring
state
stone
temnik
water