英文關鍵字
evaporation
silt
rural
scene
basin
pond
agriculture
environment
landscape
exploration
manufacturing
resource
filter
ground
sand
wash
pit
river
bank
field
mineral
fertilizer
manufacture
geometrical
quarry
swamp
drainage
nature
pollution
ecology
sediment
industry
mining
treatment
drone
copter
flycam
filtration
area
produce
organic
countryside
panorama