英文關鍵字
back
backpack
bag
boy
break
caucasian
child
children
class
classmates
education
elementary
female
first
friends
friendship
full
girl
going
grade
group
happy
home
horizontal
kid
kids
learn
length
little
outdoors
people
portrait
primary
rucksack
school
schoolboy
schoolgirl
sister
study
together
view
walk
white
year
years