英文關鍵字
adolescent
adult
assistant
behaviour
bonding
boys
breaktime
building
candid
caucasian
chatting
classroom
close
discussion
education
educational
female
females
free
friendly
girls
group
head
high
indoors
innocent
job
laughing
learning
lesson
male
males
man
modern
peers
people
profession
school
smile
standing
stress
students
talking
teacher
teaching
teenagers
teens
toothy
uniform
woman
working
young