英文關鍵字
backpack
bag
beautiful
bench
boy
caucasian
chat
cheerful
child
childhood
children
classmates
classroom
communication
education
female
friends
friendship
girl
girls
greeting
hall
happiness
happy
indoor
kid
kids
laugh
male
people
pretty
pupil
pupils
rest
school
schoolchildren
schoolgirl
schoolgirls
sitting
stack
student
study
studying
together
white