英文關鍵字
activity
adult
background
bark
care
conservation
countryside
deforestation
earth
ecology
education
elderly
environment
family
forest
future
generation
global
green
happy
help
learning
leisure
lifestyle
love
natural
nature
outdoor
outside
park
people
protection
retired
retirement
save
senior
sunlight
sunny
tablet
talking
technology
together
touch
tree
trunk
volunteer
wild
woman
woods