英文關鍵字
2019
2020
backdrop
beautiful
bio
care
close
corona
coronavirus
cov
covid
danger
discovery
disease
dna
epidemic
experiment
happy
health
home
ignore
infection
influenza
isolated
lab
little
look
male
man
ncov
outbreak
outdoor
outdoors
pandemic
people
professional
prohibition
protection
safety
sars
shirt
situation
student
study
virus
wearing
white
work