硫黄
acid
adventure
asia
asian
basket
caldera
collecting
cooling
crater
culture
danger
dangerous
destinations
east
ethnic
exotic
exploration
extracting
extraction
gases
hard
ijen
indonesia
indonesian
industry
job
kawah
labor
landmarks
miner
mining
nature
noxious
people
pipes
places
poisonous
porter
spraying
standing
sulphuric
tough
tourism
toxic
volcano
water
work
worker