英文關鍵字
20s
academic
assignment
attractive
book
bookcase
bookshelf
boy
caucasian
classmate
college
desk
education
female
friend
friendship
homework
indoors
information
knowledge
learning
library
literature
male
man
pointing
research
researching
revising
revision
scrolling
shelf
showing
student
study
studying
tablet
textbook
together
touching
touchscreen
university
using
woman