英文關鍵字
2019
2020
backdrop
beautiful
bio
blue
boy
care
chemical
corona
coronavirus
cov
covid
danger
day
disease
dna
down
epidemic
hand
health
hold
home
infection
influenza
isolated
isolation
lab
lock
look
male
mask
medicine
ncov
outbreak
outdoor
pandemic
people
protection
quarantine
safety
sars
schoolboy
serious
situation
study
sun
virus
watch
wearing