英文關鍵字
algae
background
bacteria
beach
below
bubble
cane
chemical
city
coast
coastal
container
danger
debris
dirt
dirty
disease
drown
ecology
environment
fall
filth
float
flowers
garbage
global
hostility
industry
jellyfish
leavings
movement
nature
ocean
particles
pier
pollute
pollution
pure
reed
refuse
rough
rubbish
safety
sand
sewage
shit
splash
submerged
summer
survival
texture
toxic
trash
treatment
tropical
underwater
unhygienic
water
waves