英文關鍵字
background
barrier
broken
climate
closeup
concrete
discharges
drain
dripping
drop
drown
ecological
effluents
emergency
environment
floe
flood
flow
flush
formations
freeze
glacier
greywater
humidity
iced
industrial
ladder
melting
meteorology
mud
outflow
overfill
overflow
plunging
pollution
power
problem
rain
river
season
snow
spring
stream
temperature
thawing
warming
water
waves
wet
winter