英文關鍵字
appearance
boys
british
building
caucasian
child
childhood
classroom
concentration
connection
device
digital
education
england
english
female
friends
girl
girls
group
happy
indoors
kids
learners
lesson
medium
natural
online
people
person
preadolescent
primary
private
public
school
schoolboy
schoolgirl
secondary
sitting
student
tablet
teenage
teenager
touchscreen
typing
uniform
young