英文關鍵字
prunus
rate
motion
transport
flow
hydrology
hydro
geology
groundwater
precipitation
agriculture
rural
technique
planting
seeding
carry
carried
life
dug
irrigate
irrigated
country
countryside
aerial
view
close
infrastructure
ancient
aqueduct
drinking
use
supply
control
usda
historical
system
gravity
farming
efficiency
efficient
tradition
traditional
practice
method
methodology
resource
development