英文關鍵字
wide
smile
teenager
straight
teeth
plaque
lips
caries
skin
even
body
part
portrait
boy
problem
pimple
shows
toothy
dentistry
oral
yellow
gum
face
hygiene
dental
medicine
grinning
student
person
organism
treatment
decay
procedure
lifestyles
bad
medical
dirty
open
children
refreshing
buildup
guy
grimace
child
patient
molar