英文關鍵字
backpack
boy
break
caucasian
child
childhood
classmates
corona
coronavirus
covid19
curly
education
elbow
epidemic
face
flu
friends
girl
grass
green
kid
little
male
mask
medical
outdoor
pandemic
park
portrait
protect
protection
quarantine
rest
school
schoolgirl
smile
student
summer
teenager
vacation
virus
young