英文關鍵字
aqueous
brown
coal
cooling
evaporate
fossil
fuel
generating
germany
highway
lapse
motorway
northrhine
plant
power
powerhouse
sky
station
steam
time
tower
vapor
vapour
video
water
weisweiler
westphalia
英文關鍵字
aqueous
brown
coal
cooling
evaporate
fossil
fuel
generating
germany
highway
lapse
motorway
northrhine
plant
power
powerhouse
sky
station
steam
time
tower
vapor
vapour
video
water
weisweiler
westphalia