英文關鍵字
background
broken
canal
dirty
ecology
environment
environmental
float
floating
flow
flowing
industrial
industry
lichen
nature
pollution
river
rural
sewage
stream
toxic
urban
waste
water
way
wet
英文關鍵字
background
broken
canal
dirty
ecology
environment
environmental
float
floating
flow
flowing
industrial
industry
lichen
nature
pollution
river
rural
sewage
stream
toxic
urban
waste
water
way
wet