英文關鍵字
activity
alarm
alert
alertness
alone
bacillus
bacteria
because
child
childhood
children
closed
colorful
coronavirus
covid
crisis
due
epidemic
europe
exceptional
fun
germ
health
laws
lonely
madrid
measures
microbe
movement
moving
natural
nature
neighborhood
old
orchard
outdoor
pandemic
park
playground
precaution
prohibition
recreation
retro
rural
sad
safety
solitude
spain
state
structure
surrounded
swings
town
trees
virus
wind