英文關鍵字
biggest
city
close
cold
cone
crater
deposit
diamond
digging
ecology
field
geology
ground
industry
jewellery
kimberlite
kimberlitovaya
land
landscape
large
largest
mine
mir
mirny
north
old
outdoor
peace
pipe
quarry
russia
russian
siberia
spiral
spring
tube
unique
valuable
winter
world
yakut
yakutia
yakutsk