英文關鍵字
abandoned
barrier
bench
caution
city
clean
closed
coronavirus
covid19
danger
day
eastern
empty
europe
forest
front
grass
green
hazard
infection
infectious
isolated
lighting
medical
natural
nature
nobody
outdoor
outdoors
outside
park
people
police
precaution
prevention
quarantine
real
recreation
red
rope
safety
season
seat
spring
sunny
sunset
tape
tapetightened
time
tree
trees
urban
virus
visitors
walk
warning
white
wood