英文關鍵字
activity
affected
animals
beaver
beavers
beavertype
construction
dam
damage
death
destruction
detriment
doom
drowned
dying
environment
environmental
flood
flooded
food
forest
forestry
forests
hardwood
harm
harmful
harvesting
high
impoundment
loss
lumber
malicious
management
nature
partially
sector
snow
spate
spillway
spring
spruce
submerged
timber
time
tree
trees
weir
winter
wood
wooden
woodworm
work
young