英文關鍵字
coronavirus
home
education
schooling
distance
learning
blackboard
school
study
homeschooling
homeschool
studying
learn
remote
quarantine
lockdown
black
board
corona
virus
text
lettering
greenboard
chalk
chalkboard
college
green
lecture
letter
class
covid19
epidemic
flu
infection
influenza
pandemic
classroom
closed
lock
yellow
ribbon
table
self
isolation
write
covid
19
drawn
university
outbreak