英文關鍵字
american
backpack
bag
boys
break
caucasian
cheerful
childhood
children
class
confident
elementary
end
energetic
ethnicity
fifth
friends
friendship
front
fun
girls
grade
group
happy
home
horizontal
incidental
knowledge
late
low
outdoors
people
person
primary
pupils
racing
recess
rucksack
school
schoolboys
schoolchildren
smiling
space
students
summer
term
time
uniform
usa
view