英文關鍵字
animal
bright
color
control
damage
danger
dark
dead
death
dirty
disaster
edge
environment
erosion
fish
food
freshwater
garbage
global
industry
lake
life
natural
nature
plant
pollution
pond
river
rough
sand
scale
sea
sewage
smell
substance
surface
toxic
underwater
unpleasant
warning
waste
water
wild