英文關鍵字
adult
air
breathing
caucasian
coronavirus
covid19
deeply
distancing
end
enjoying
female
free
fresh
gloves
green
hat
hygiene
lake
look
looking
mask
measures
medicine
nature
pandemic
park
people
person
prevention
protection
protective
quarantine
relax
restriction
social
stop
straw
summer
sunshine
trees
virus
walk
water
white
woman