英文關鍵字
evaporation
silt
rural
scene
basin
pond
agriculture
environment
landscape
exploration
manufacturing
resource
filter
geometrical
sand
quarry
river
bank
swamp
drainage
nature
pollution
toxic
ecology
sediment
industry
mining
pit
ground
field
water
wet
place
pump
sewage
treatment
plant
aerial
view
drone
copter
flycam