英文關鍵字
2019ncov
abandoned
alert
bacteria
care
caution
concept
contagious
coronavirus
covid19
discarded
disease
disposable
disused
epidemic
horizontal
infection
influenza
junk
mask
medical
obsolete
outdoors
pandemic
pneumonia
protect
respiratory
risk
rubbish
safety
swaying
swinging
trash
unwanted
used
virus
wellbeing
wind