英文關鍵字
19
3d
abstract
animated
animation
background
backgrounds
bacteria
biology
black
blue
care
career
cell
cells
cgi
closeup
concept
corona
coronavirus
covid
covid19
danger
dangerous
disease
epidemic
flu
health
healthcare
illness
infect
infection
influenza
loop
medical
medicine
mers
microbiology
microphone
pathogen
planet
prevention
red
sars
science
sickness
virology
virus