英文關鍵字
background
black
brunette
buttons
chalkboard
chatting
class
classroom
closeup
college
concept
desk
doing
education
exam
fingers
girl
hand
hands
higher
hold
holding
homework
jacket
knowledges
learn
learner
lifestyle
mobile
modern
person
school
schoolgirl
science
scientist
sitting
smartphone
student
study
studying
suit
teach
teen
touching
typing
unknown
work
young