英文關鍵字
background
barrel
cascade
clear
crude
design
diesel
dirty
drip
energy
environment
erupt
eruption
exploration
fountain
fuel
gasoline
geyser
gush
industrial
ink
jet
leak
motion
oil
petrol
petroleum
pressure
pure
splash
stream
transparency
watercourse
waterdrop
waterdroplets
waterfallparticle
waterfalls
waterfountain