英文關鍵字
band
caution
child
childhood
children
city
close
closed
closing
contagious
corona
coronavirus
covid
disease
empty
epidemic
equipment
fencing
focus
forbidden
house
infection
isolation
nature
outbreak
outdoor
outside
pandemic
park
play
playground
protection
quarantine
quarantined
recreation
red
restricted
restriction
safety
security
selective
street
swing
tape
urban
virus
warning
yard