英文關鍵字
boy
care
child
childhood
children
class
classmates
classroom
coovid19
coronavirus
education
epidemic
face
girl
group
health
holding
indoors
kid
learning
lesson
lockdown
mask
masks
modern
pandemic
people
portrait
protect
protective
quarantine
safe
school
schoolboy
schoolchildren
schoolgirl
september
sick
stay
student
studying
surgical
virus
wearing