英文關鍵字
activated
aerated
animation
biology
businesswoman
circle
clean
cleaner
coffee
concrete
conservation
construction
control
digital
dirty
effluent
environment
environmental
factory
generation
ground
hydro
industrial
industry
lapse
open
palms
plant
pollution
pond
power
process
processing
purification
purified
purity
recycled
recycling
sedimentation
sewage
sewer
slimy
sludge
smell
storage
supply
system
tank
tap
time
treatment
ubiquitous
unhygienic
waste
water