英文關鍵字
2020
alone
apocalypse
bacterium
bad
caution
chair
closed
concepts
contagious
contamination
corona
coronavirus
court
covid
covid19
creepy
crisis
depression
descriptive
disease
emergency
epidemic
flu
game
hanging
horizontal
infection
isolation
kindergarten
lonely
moving
news
pandemic
playful
playground
pneumonia
quarantine
recreation
safety
sars
school
slide
solitude
swing
threat
virus
warning