英文關鍵字
aqua
backdrop
background
beautiful
blue
water
bright
change
clean
clear
climate
colorful
cool
crisis
desalination
drinking
ecological
ecology
flowing
fresh
lake
liquid
natural
nature
ocean
outdoor
pond
pool
pure
recreation
reflection
reserves
resources
river
scarcity
sea
sport
sports
summer
surface
swimming
transparent
travel
treatment
turquoise
vacation
wave