英文關鍵字
child
coronavirus
girl
home
quarantine
computer
education
flu
homework
pandemic
learning
internet
distance
school
studying
virus
bacteria
epidemic
illness
infection
laptop
lesson
mask
online
pupil
sickness
training
childhood
indoors
little
social
student
blond
covid19
doing
remote
respiratory
safety
elearning
kids
orvi
virtual
glasses
desk
exam
isolated
schoolgirl
sitting