英文關鍵字
potosi
silver
mining
industry
rock
andes
mountains
metal
ore
pure
machinery
investment
hunt
grey
mineral
refine
greed
shiny
wealth
rich
industrial
gray
fortune
stone
precious
value
heavy
metallic
quartz
travel
destination
excavation
geology
exploitation
ecology
resources
equipment
technology
environment
production
engineering
digging
mountain
top
nature
valley
bolivia
entrance
inside
cero
rico
high
altitude