英文關鍵字
book
books
boy
boys
browse
class
classroom
college
conversation
digital
discussion
educate
education
explain
fingers
flip
flipping
hand
hands
holding
indoor
learning
lesson
looking
male
page
person
read
reading
school
schoolboy
schoolboys
scrolling
sitting
student
students
study
studying
table
talk
talking
teen
teenager
teenagers
textbook
touching
training
two
watching