英文關鍵字
africa
background
bacteria
bacterium
biology
cervix
closeup
diplococcus
disease
dysuria
gonorrhea
health
human
illness
infection
infectious
inflammatory
macro
medical
medicine
membrane
microbiology
microscope
microscopic
mucous
oral
organism
pain
pelvic
penis
science
sex
sexual
sexually
sick
sickness
std
symptoms
transmitted
urethra
usa
uterus
vaginal