英文關鍵字
1080p
20s
adult
background
bacteria
bacterium
biology
blood
caucasian
cell
definition
diagram
digital
digitally
disease
doctor
epidemic
expertise
generated
germs
hd
healthcare
high
highdef
immune
infection
male
man
mask
microbes
microbiology
occupation
one
organism
person
professional
research
retrovirus
scrubs
service
skill
standing
stream
surgical
system
touching
virus
young