英文關鍵字
1080p
20s
academic
adult
caucasian
class
classmates
classroom
college
computer
definition
desk
education
female
girl
happy
hd
high
highdef
higher
knowledge
laptop
learn
learning
lesson
male
man
notebook
people
portrait
school
sitting
smiling
student
students
study
studying
technology
teenager
three
ultra
university
using
wireless
young