英文關鍵字
big
blast
burst
career
cast
coal
construction
copper
destruction
dragline
dust
dynamite
earth
ecology
environment
equipment
excavate
excavation
explosion
extreme
ferrous
gold
granite
great
heavy
hole
industrial
industry
ironstone
lava
limestone
metallurgy
mineral
open
ore
pit
quarry
resource
rock
silver
sky
smoke
technology
terrace